refactor(telemetry): avoid doing two separate http requests in stop telemetry by bwoebi · Pull Request #2435 · DataDog/libdatadog

bwoebi · 2026-08-28T17:41:36Z

This has not much impact in practice, but is observable, and obviously also races against each other, delivering payloads after app closing, which is not that problematic, but could be unexpected.

datadog-datadog-us1-prod · 2026-08-28T17:50:34Z

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 80.00%
• Overall Coverage: 76.64% (-0.03%)

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: 02d95f0 | Docs | View more details | Give us feedback!}

pr-commenter · 2026-08-28T17:51:18Z

Benchmarks

Comparison

Benchmark execution time: 2026-08-31 11:29:59

Comparing candidate commit 02d95f0 in PR branch bob/consolidate-stop-telem with baseline commit 9fb27ea in branch main.

Found 3 performance improvements and 0 performance regressions! Performance is the same for 22 metrics, 0 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

scenario:trace_buffer/4_senders/no_delay

🟩 execution_time [-240.185µs; -206.771µs] or [-9.870%; -8.497%]
🟩 throughput [+138650.622op/s; +161533.424op/s] or [+9.360%; +10.905%]

scenario:trace_buffer/8_senders/no_delay

🟩 throughput [+44231.526op/s; +53376.405op/s] or [+4.157%; +5.017%]

Benchmark execution time: 2026-08-31 11:27:34

Comparing candidate commit 02d95f0 in PR branch bob/consolidate-stop-telem with baseline commit 9fb27ea in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 3 metrics, 0 unstable metrics.

Explanation

This is an A/B test comparing a candidate commit's performance against that of a baseline commit. Performance changes are noted in the tables below as:

🟩 = significantly better candidate vs. baseline
🟥 = significantly worse candidate vs. baseline

We compute a confidence interval (CI) over the relative difference of means between metrics from the candidate and baseline commits, considering the baseline as the reference.

If the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD), the change is considered significant.

Feel free to reach out to #apm-benchmarking-platform on Slack if you have any questions.

More details about the CI and significant changes

You can imagine this CI as a range of values that is likely to contain the true difference of means between the candidate and baseline commits.

CIs of the difference of means are often centered around 0%, because often changes are not that big:

---------------------------------(------|---^--------)-------------------------------->
                              -0.6%    0%  0.3%     +1.2%
                                 |          |        |
         lower bound of the CI --'          |        |
sample mean (center of the CI) -------------'        |
         upper bound of the CI ----------------------'

As described above, a change is considered significant if the CI is entirely outside the configured SIGNIFICANT_IMPACT_THRESHOLD (or the deprecated UNCONFIDENCE_THRESHOLD).

For instance, for an execution time metric, this confidence interval indicates a significantly worse performance:

----------------------------------------|---------|---(---------^---------)---------->
                                       0%        1%  1.3%      2.2%      3.1%
                                                  |   |         |         |
       significant impact threshold --------------'   |         |         |
                      lower bound of CI --------------'         |         |
       sample mean (center of the CI) --------------------------'         |
                      upper bound of CI ----------------------------------'

Candidate

Candidate benchmark details

Group 1

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`02d95f0`	1788175021	bob/consolidate-stop-telem

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
trace_buffer/1_senders/10us_delay	execution_time	56.282ms	56.809ms ± 0.354ms	56.662ms ± 0.148ms	57.060ms	57.529ms	57.596ms	57.657ms	1.76%	0.867	-0.517	0.62%	0.025ms	1	200
trace_buffer/1_senders/10us_delay	throughput	15609.441op/s	15843.213op/s ± 98.279op/s	15883.799op/s ± 41.354op/s	15916.411op/s	15952.539op/s	15978.638op/s	15990.919op/s	0.67%	-0.853	-0.540	0.62%	6.949op/s	1	200
trace_buffer/1_senders/1us_delay	execution_time	50.024ms	50.073ms ± 0.033ms	50.071ms ± 0.016ms	50.086ms	50.139ms	50.178ms	50.201ms	0.26%	1.137	2.035	0.07%	0.002ms	1	200
trace_buffer/1_senders/1us_delay	throughput	17927.895op/s	17973.821op/s ± 11.841op/s	17974.416op/s ± 5.792op/s	17982.494op/s	17988.945op/s	17990.062op/s	17991.435op/s	0.09%	-1.132	2.017	0.07%	0.837op/s	1	200
trace_buffer/1_senders/no_delay	execution_time	332.619µs	338.983µs ± 5.726µs	338.192µs ± 1.576µs	339.942µs	343.162µs	354.714µs	408.055µs	20.66%	9.076	104.761	1.68%	0.405µs	1	200
trace_buffer/1_senders/no_delay	throughput	2205586.695op/s	2655660.675op/s ± 39249.399op/s	2661208.687op/s ± 12399.040op/s	2672817.298op/s	2685875.083op/s	2697026.597op/s	2705794.772op/s	1.68%	-7.903	85.500	1.47%	2775.352op/s	1	200
trace_buffer/2_senders/10us_delay	execution_time	56.745ms	57.240ms ± 0.201ms	57.215ms ± 0.133ms	57.383ms	57.612ms	57.679ms	57.739ms	0.92%	0.252	-0.493	0.35%	0.014ms	1	200
trace_buffer/2_senders/10us_delay	throughput	31174.579op/s	31446.837op/s ± 110.428op/s	31460.341op/s ± 73.293op/s	31524.396op/s	31607.440op/s	31670.869op/s	31721.041op/s	0.83%	-0.236	-0.497	0.35%	7.808op/s	1	200
trace_buffer/2_senders/1us_delay	execution_time	50.046ms	50.108ms ± 0.032ms	50.105ms ± 0.019ms	50.120ms	50.168ms	50.204ms	50.251ms	0.29%	1.365	2.954	0.06%	0.002ms	1	200
trace_buffer/2_senders/1us_delay	throughput	35820.199op/s	35922.464op/s ± 22.870op/s	35924.725op/s ± 13.362op/s	35939.226op/s	35951.334op/s	35956.371op/s	35966.834op/s	0.12%	-1.359	2.930	0.06%	1.617op/s	1	200
trace_buffer/2_senders/no_delay	execution_time	850.320µs	895.855µs ± 18.950µs	895.158µs ± 12.518µs	906.806µs	925.381µs	938.893µs	987.618µs	10.33%	0.548	2.106	2.11%	1.340µs	1	200
trace_buffer/2_senders/no_delay	throughput	1822567.219op/s	2010139.348op/s ± 42133.814op/s	2010817.681op/s ± 28144.912op/s	2040264.052op/s	2079316.572op/s	2108725.005op/s	2116850.127op/s	5.27%	-0.325	1.407	2.09%	2979.311op/s	1	200
trace_buffer/4_senders/10us_delay	execution_time	57.301ms	57.576ms ± 0.114ms	57.568ms ± 0.064ms	57.633ms	57.773ms	57.933ms	57.960ms	0.68%	0.751	1.261	0.20%	0.008ms	1	200
trace_buffer/4_senders/10us_delay	throughput	62111.762op/s	62526.643op/s ± 123.764op/s	62534.479op/s ± 69.797op/s	62602.748op/s	62702.472op/s	62761.632op/s	62825.773op/s	0.47%	-0.735	1.227	0.20%	8.751op/s	1	200
trace_buffer/4_senders/1us_delay	execution_time	50.106ms	50.176ms ± 0.046ms	50.162ms ± 0.022ms	50.198ms	50.268ms	50.285ms	50.418ms	0.51%	1.614	3.798	0.09%	0.003ms	1	200
trace_buffer/4_senders/1us_delay	throughput	71403.154op/s	71747.445op/s ± 65.105op/s	71766.929op/s ± 30.898op/s	71787.696op/s	71817.948op/s	71833.512op/s	71847.345op/s	0.11%	-1.605	3.745	0.09%	4.604op/s	1	200
trace_buffer/4_senders/no_delay	execution_time	1.961ms	2.210ms ± 0.084ms	2.217ms ± 0.061ms	2.274ms	2.335ms	2.365ms	2.393ms	7.93%	-0.357	-0.301	3.79%	0.006ms	1	200
trace_buffer/4_senders/no_delay	throughput	1504681.597op/s	1631384.694op/s ± 62983.784op/s	1623929.383op/s ± 43420.724op/s	1672205.228op/s	1738386.049op/s	1796703.566op/s	1835834.924op/s	13.05%	0.542	-0.029	3.85%	4453.626op/s	1	200
trace_buffer/8_senders/10us_delay	execution_time	57.679ms	58.039ms ± 0.273ms	57.947ms ± 0.147ms	58.222ms	58.577ms	58.742ms	58.784ms	1.44%	0.938	-0.164	0.47%	0.019ms	1	200
trace_buffer/8_senders/10us_delay	throughput	122482.056op/s	124056.485op/s ± 581.187op/s	124250.971op/s ± 313.753op/s	124509.404op/s	124706.051op/s	124768.380op/s	124828.941op/s	0.47%	-0.925	-0.194	0.47%	41.096op/s	1	200
trace_buffer/8_senders/1us_delay	execution_time	50.217ms	50.292ms ± 0.060ms	50.278ms ± 0.033ms	50.321ms	50.381ms	50.552ms	50.634ms	0.71%	2.111	7.454	0.12%	0.004ms	1	200
trace_buffer/8_senders/1us_delay	throughput	142195.999op/s	143163.451op/s ± 170.870op/s	143204.324op/s ± 92.848op/s	143281.048op/s	143352.028op/s	143371.032op/s	143377.855op/s	0.12%	-2.093	7.335	0.12%	12.082op/s	1	200
trace_buffer/8_senders/no_delay	execution_time	5.687ms	6.474ms ± 0.166ms	6.500ms ± 0.098ms	6.592ms	6.674ms	6.722ms	6.792ms	4.50%	-1.318	2.819	2.55%	0.012ms	1	200
trace_buffer/8_senders/no_delay	throughput	1060041.954op/s	1112808.313op/s ± 29592.560op/s	1107766.787op/s ± 16419.917op/s	1125483.005op/s	1167466.508op/s	1212106.582op/s	1266029.190op/s	14.29%	1.578	4.116	2.65%	2092.510op/s	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
trace_buffer/1_senders/10us_delay	execution_time	[56.760ms; 56.858ms] or [-0.086%; +0.086%]	None	None	None
trace_buffer/1_senders/10us_delay	throughput	[15829.592op/s; 15856.833op/s] or [-0.086%; +0.086%]	None	None	None
trace_buffer/1_senders/1us_delay	execution_time	[50.068ms; 50.077ms] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/1us_delay	throughput	[17972.180op/s; 17975.462op/s] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/no_delay	execution_time	[338.189µs; 339.776µs] or [-0.234%; +0.234%]	None	None	None
trace_buffer/1_senders/no_delay	throughput	[2650221.086op/s; 2661100.264op/s] or [-0.205%; +0.205%]	None	None	None
trace_buffer/2_senders/10us_delay	execution_time	[57.212ms; 57.268ms] or [-0.049%; +0.049%]	None	None	None
trace_buffer/2_senders/10us_delay	throughput	[31431.533op/s; 31462.142op/s] or [-0.049%; +0.049%]	None	None	None
trace_buffer/2_senders/1us_delay	execution_time	[50.104ms; 50.112ms] or [-0.009%; +0.009%]	None	None	None
trace_buffer/2_senders/1us_delay	throughput	[35919.294op/s; 35925.633op/s] or [-0.009%; +0.009%]	None	None	None
trace_buffer/2_senders/no_delay	execution_time	[893.229µs; 898.481µs] or [-0.293%; +0.293%]	None	None	None
trace_buffer/2_senders/no_delay	throughput	[2004300.007op/s; 2015978.689op/s] or [-0.290%; +0.290%]	None	None	None
trace_buffer/4_senders/10us_delay	execution_time	[57.560ms; 57.591ms] or [-0.027%; +0.027%]	None	None	None
trace_buffer/4_senders/10us_delay	throughput	[62509.491op/s; 62543.796op/s] or [-0.027%; +0.027%]	None	None	None
trace_buffer/4_senders/1us_delay	execution_time	[50.170ms; 50.182ms] or [-0.013%; +0.013%]	None	None	None
trace_buffer/4_senders/1us_delay	throughput	[71738.423op/s; 71756.468op/s] or [-0.013%; +0.013%]	None	None	None
trace_buffer/4_senders/no_delay	execution_time	[2.198ms; 2.222ms] or [-0.526%; +0.526%]	None	None	None
trace_buffer/4_senders/no_delay	throughput	[1622655.747op/s; 1640113.640op/s] or [-0.535%; +0.535%]	None	None	None
trace_buffer/8_senders/10us_delay	execution_time	[58.002ms; 58.077ms] or [-0.065%; +0.065%]	None	None	None
trace_buffer/8_senders/10us_delay	throughput	[123975.938op/s; 124137.032op/s] or [-0.065%; +0.065%]	None	None	None
trace_buffer/8_senders/1us_delay	execution_time	[50.284ms; 50.301ms] or [-0.017%; +0.017%]	None	None	None
trace_buffer/8_senders/1us_delay	throughput	[143139.771op/s; 143187.132op/s] or [-0.017%; +0.017%]	None	None	None
trace_buffer/8_senders/no_delay	execution_time	[6.452ms; 6.497ms] or [-0.355%; +0.355%]	None	None	None
trace_buffer/8_senders/no_delay	throughput	[1108707.069op/s; 1116909.557op/s] or [-0.369%; +0.369%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`02d95f0`	1788175021	bob/consolidate-stop-telem

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
concentrator/add_spans_to_concentrator	execution_time	9.570ms	9.598ms ± 0.019ms	9.593ms ± 0.012ms	9.608ms	9.630ms	9.645ms	9.704ms	1.16%	1.404	3.984	0.20%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
concentrator/add_spans_to_concentrator	execution_time	[9.595ms; 9.601ms] or [-0.027%; +0.027%]	None	None	None

Group 1

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`02d95f0`	1788175021	bob/consolidate-stop-telem

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
receiver_entry_point/report/2644	execution_time	5.072ms	5.102ms ± 0.018ms	5.101ms ± 0.011ms	5.110ms	5.139ms	5.157ms	5.158ms	1.12%	0.818	0.662	0.35%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
receiver_entry_point/report/2644	execution_time	[5.100ms; 5.105ms] or [-0.048%; +0.048%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`02d95f0`	1788175021	bob/consolidate-stop-telem

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
write only interface	execution_time	1.058µs	1.074µs ± 0.006µs	1.074µs ± 0.004µs	1.078µs	1.081µs	1.082µs	1.083µs	0.83%	-0.728	-0.011	0.51%	0.000µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
write only interface	execution_time	[1.073µs; 1.074µs] or [-0.071%; +0.071%]	None	None	None

Group 3

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`02d95f0`	1788175021	bob/consolidate-stop-telem

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
two way interface	execution_time	14.671µs	15.652µs ± 0.240µs	15.630µs ± 0.099µs	15.732µs	15.953µs	16.160µs	17.755µs	13.59%	3.391	30.171	1.53%	0.017µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
two way interface	execution_time	[15.619µs; 15.685µs] or [-0.212%; +0.212%]	None	None	None

Baseline

Baseline benchmark details

Group 1

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`9fb27ea`	1787934813	main

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
trace_buffer/1_senders/10us_delay	execution_time	56.289ms	56.582ms ± 0.165ms	56.546ms ± 0.082ms	56.654ms	56.854ms	57.138ms	57.535ms	1.75%	2.089	7.804	0.29%	0.012ms	1	200
trace_buffer/1_senders/10us_delay	throughput	15642.604op/s	15906.213op/s ± 46.133op/s	15916.304op/s ± 23.120op/s	15935.661op/s	15957.384op/s	15970.249op/s	15988.834op/s	0.46%	-2.042	7.496	0.29%	3.262op/s	1	200
trace_buffer/1_senders/1us_delay	execution_time	50.023ms	50.083ms ± 0.034ms	50.079ms ± 0.011ms	50.088ms	50.160ms	50.189ms	50.210ms	0.26%	1.368	2.815	0.07%	0.002ms	1	200
trace_buffer/1_senders/1us_delay	throughput	17924.552op/s	17970.099op/s ± 12.026op/s	17971.622op/s ± 3.903op/s	17975.868op/s	17988.780op/s	17991.167op/s	17991.628op/s	0.11%	-1.362	2.800	0.07%	0.850op/s	1	200
trace_buffer/1_senders/no_delay	execution_time	326.962µs	333.928µs ± 4.848µs	333.840µs ± 1.343µs	335.040µs	337.357µs	346.964µs	385.809µs	15.57%	6.471	64.741	1.45%	0.343µs	1	200
trace_buffer/1_senders/no_delay	throughput	2332758.651op/s	2695714.775op/s ± 36031.014op/s	2695899.757op/s ± 10804.719op/s	2710041.855op/s	2738240.167op/s	2750479.133op/s	2752614.965op/s	2.10%	-5.473	50.884	1.33%	2547.777op/s	1	200
trace_buffer/2_senders/10us_delay	execution_time	56.829ms	57.216ms ± 0.163ms	57.227ms ± 0.120ms	57.321ms	57.495ms	57.554ms	57.570ms	0.60%	-0.033	-0.549	0.28%	0.012ms	1	200
trace_buffer/2_senders/10us_delay	throughput	31266.080op/s	31460.052op/s ± 89.832op/s	31453.794op/s ± 66.020op/s	31526.285op/s	31600.345op/s	31651.759op/s	31674.189op/s	0.70%	0.045	-0.547	0.28%	6.352op/s	1	200
trace_buffer/2_senders/1us_delay	execution_time	49.984ms	50.111ms ± 0.039ms	50.105ms ± 0.018ms	50.121ms	50.192ms	50.241ms	50.318ms	0.42%	1.580	5.015	0.08%	0.003ms	1	200
trace_buffer/2_senders/1us_delay	throughput	35772.730op/s	35920.620op/s ± 27.906op/s	35924.698op/s ± 12.625op/s	35937.756op/s	35951.589op/s	35959.277op/s	36011.813op/s	0.24%	-1.569	4.973	0.08%	1.973op/s	1	200
trace_buffer/2_senders/no_delay	execution_time	839.989µs	890.739µs ± 19.991µs	889.555µs ± 11.336µs	902.128µs	918.763µs	934.171µs	1043.052µs	17.26%	2.135	15.538	2.24%	1.414µs	1	200
trace_buffer/2_senders/no_delay	throughput	1725705.734op/s	2021766.477op/s ± 43667.092op/s	2023484.335op/s ± 25729.356op/s	2047865.197op/s	2087464.543op/s	2119465.194op/s	2142884.667op/s	5.90%	-1.401	9.498	2.15%	3087.730op/s	1	200
trace_buffer/4_senders/10us_delay	execution_time	57.155ms	57.501ms ± 0.129ms	57.501ms ± 0.084ms	57.573ms	57.735ms	57.831ms	57.855ms	0.62%	0.254	0.233	0.22%	0.009ms	1	200
trace_buffer/4_senders/10us_delay	throughput	62224.528op/s	62608.348op/s ± 140.092op/s	62607.752op/s ± 91.449op/s	62707.499op/s	62823.832op/s	62908.968op/s	62986.132op/s	0.60%	-0.239	0.223	0.22%	9.906op/s	1	200
trace_buffer/4_senders/1us_delay	execution_time	50.115ms	50.170ms ± 0.042ms	50.160ms ± 0.021ms	50.190ms	50.258ms	50.288ms	50.353ms	0.38%	1.326	1.702	0.08%	0.003ms	1	200
trace_buffer/4_senders/1us_delay	throughput	71495.634op/s	71755.734op/s ± 60.436op/s	71770.649op/s ± 30.229op/s	71798.248op/s	71824.220op/s	71830.373op/s	71835.252op/s	0.09%	-1.321	1.682	0.08%	4.273op/s	1	200
trace_buffer/4_senders/no_delay	execution_time	2.178ms	2.433ms ± 0.087ms	2.440ms ± 0.060ms	2.496ms	2.560ms	2.604ms	2.632ms	7.84%	-0.257	-0.251	3.55%	0.006ms	1	200
trace_buffer/4_senders/no_delay	throughput	1367926.874op/s	1481292.671op/s ± 53370.937op/s	1475161.089op/s ± 37087.034op/s	1514607.007op/s	1573197.075op/s	1615768.520op/s	1652937.623op/s	12.05%	0.443	-0.017	3.59%	3773.895op/s	1	200
trace_buffer/8_senders/10us_delay	execution_time	57.563ms	57.909ms ± 0.212ms	57.841ms ± 0.138ms	58.068ms	58.308ms	58.424ms	58.574ms	1.27%	0.759	-0.270	0.36%	0.015ms	1	200
trace_buffer/8_senders/10us_delay	throughput	122922.367op/s	124334.727op/s ± 453.023op/s	124478.434op/s ± 297.415op/s	124682.264op/s	124883.321op/s	124976.142op/s	125081.164op/s	0.48%	-0.746	-0.297	0.36%	32.034op/s	1	200
trace_buffer/8_senders/1us_delay	execution_time	50.200ms	50.293ms ± 0.067ms	50.276ms ± 0.039ms	50.325ms	50.433ms	50.510ms	50.553ms	0.55%	1.262	1.722	0.13%	0.005ms	1	200
trace_buffer/8_senders/1us_delay	throughput	142424.652op/s	143162.405op/s ± 189.846op/s	143209.076op/s ± 110.930op/s	143290.313op/s	143388.320op/s	143420.083op/s	143427.621op/s	0.15%	-1.254	1.693	0.13%	13.424op/s	1	200
trace_buffer/8_senders/no_delay	execution_time	6.320ms	6.768ms ± 0.091ms	6.781ms ± 0.050ms	6.826ms	6.900ms	6.934ms	6.956ms	2.59%	-1.147	3.067	1.34%	0.006ms	1	200
trace_buffer/8_senders/no_delay	throughput	1035044.746op/s	1064004.347op/s ± 14587.101op/s	1061868.548op/s ± 7881.645op/s	1070785.837op/s	1089715.969op/s	1111559.765op/s	1139195.744op/s	7.28%	1.306	3.782	1.37%	1031.464op/s	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
trace_buffer/1_senders/10us_delay	execution_time	[56.559ms; 56.605ms] or [-0.040%; +0.040%]	None	None	None
trace_buffer/1_senders/10us_delay	throughput	[15899.819op/s; 15912.607op/s] or [-0.040%; +0.040%]	None	None	None
trace_buffer/1_senders/1us_delay	execution_time	[50.079ms; 50.088ms] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/1us_delay	throughput	[17968.433op/s; 17971.766op/s] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/no_delay	execution_time	[333.256µs; 334.599µs] or [-0.201%; +0.201%]	None	None	None
trace_buffer/1_senders/no_delay	throughput	[2690721.223op/s; 2700708.327op/s] or [-0.185%; +0.185%]	None	None	None
trace_buffer/2_senders/10us_delay	execution_time	[57.193ms; 57.239ms] or [-0.040%; +0.040%]	None	None	None
trace_buffer/2_senders/10us_delay	throughput	[31447.602op/s; 31472.502op/s] or [-0.040%; +0.040%]	None	None	None
trace_buffer/2_senders/1us_delay	execution_time	[50.105ms; 50.116ms] or [-0.011%; +0.011%]	None	None	None
trace_buffer/2_senders/1us_delay	throughput	[35916.752op/s; 35924.487op/s] or [-0.011%; +0.011%]	None	None	None
trace_buffer/2_senders/no_delay	execution_time	[887.968µs; 893.510µs] or [-0.311%; +0.311%]	None	None	None
trace_buffer/2_senders/no_delay	throughput	[2015714.638op/s; 2027818.316op/s] or [-0.299%; +0.299%]	None	None	None
trace_buffer/4_senders/10us_delay	execution_time	[57.483ms; 57.518ms] or [-0.031%; +0.031%]	None	None	None
trace_buffer/4_senders/10us_delay	throughput	[62588.933op/s; 62627.763op/s] or [-0.031%; +0.031%]	None	None	None
trace_buffer/4_senders/1us_delay	execution_time	[50.164ms; 50.176ms] or [-0.012%; +0.012%]	None	None	None
trace_buffer/4_senders/1us_delay	throughput	[71747.359op/s; 71764.110op/s] or [-0.012%; +0.012%]	None	None	None
trace_buffer/4_senders/no_delay	execution_time	[2.421ms; 2.445ms] or [-0.493%; +0.493%]	None	None	None
trace_buffer/4_senders/no_delay	throughput	[1473895.972op/s; 1488689.369op/s] or [-0.499%; +0.499%]	None	None	None
trace_buffer/8_senders/10us_delay	execution_time	[57.880ms; 57.938ms] or [-0.051%; +0.051%]	None	None	None
trace_buffer/8_senders/10us_delay	throughput	[124271.942op/s; 124397.511op/s] or [-0.050%; +0.050%]	None	None	None
trace_buffer/8_senders/1us_delay	execution_time	[50.283ms; 50.302ms] or [-0.018%; +0.018%]	None	None	None
trace_buffer/8_senders/1us_delay	throughput	[143136.094op/s; 143188.716op/s] or [-0.018%; +0.018%]	None	None	None
trace_buffer/8_senders/no_delay	execution_time	[6.755ms; 6.781ms] or [-0.187%; +0.187%]	None	None	None
trace_buffer/8_senders/no_delay	throughput	[1061982.715op/s; 1066025.979op/s] or [-0.190%; +0.190%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`9fb27ea`	1787934813	main

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
concentrator/add_spans_to_concentrator	execution_time	9.575ms	9.605ms ± 0.016ms	9.601ms ± 0.012ms	9.616ms	9.633ms	9.646ms	9.650ms	0.51%	0.463	-0.469	0.17%	0.001ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
concentrator/add_spans_to_concentrator	execution_time	[9.602ms; 9.607ms] or [-0.023%; +0.023%]	None	None	None

Group 1

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`9fb27ea`	1787934813	main

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
receiver_entry_point/report/2644	execution_time	5.062ms	5.119ms ± 0.032ms	5.111ms ± 0.013ms	5.128ms	5.192ms	5.217ms	5.239ms	2.51%	1.389	1.941	0.61%	0.002ms	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
receiver_entry_point/report/2644	execution_time	[5.115ms; 5.123ms] or [-0.085%; +0.085%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`9fb27ea`	1787934813	main

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
write only interface	execution_time	1.068µs	1.085µs ± 0.007µs	1.086µs ± 0.005µs	1.090µs	1.096µs	1.098µs	1.105µs	1.78%	-0.083	0.010	0.61%	0.000µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
write only interface	execution_time	[1.084µs; 1.086µs] or [-0.085%; +0.085%]	None	None	None

Group 3

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`9fb27ea`	1787934813	main

scenario	metric	min	mean ± sd	median ± mad	p75	p95	p99	max	peak_to_median_ratio	skewness	kurtosis	cv	sem	runs	sample_size
two way interface	execution_time	15.406µs	15.777µs ± 0.287µs	15.721µs ± 0.074µs	15.819µs	16.023µs	17.056µs	18.419µs	17.17%	5.750	42.887	1.82%	0.020µs	1	200

scenario	metric	95% CI mean	Shapiro-Wilk pvalue	Ljung-Box pvalue (lag=1)	Dip test pvalue
two way interface	execution_time	[15.738µs; 15.817µs] or [-0.252%; +0.252%]	None	None	None

dd-octo-sts · 2026-08-28T18:12:41Z

Artifact Size Benchmark Report

aarch64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.a	89.74 MB	89.46 MB	--.32% (-295.03 KB) 💪
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.so	8.26 MB	8.20 MB	--.75% (-64.00 KB) 💪

aarch64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.so	11.13 MB	11.06 MB	--.66% (-75.83 KB) 💪
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.a	100.97 MB	100.67 MB	--.29% (-305.66 KB) 💪

libdatadog-x64-windows

Artifact	Baseline	Commit	Change
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.dll	26.68 MB	26.55 MB	--.47% (-131.00 KB) 💪
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.lib	94.96 KB	94.96 KB	0% (0 B) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.pdb	181.16 MB	179.98 MB	--.65% (-1.18 MB) 💪
/libdatadog-x64-windows/debug/static/datadog_profiling_ffi.lib	770.91 MB	763.56 MB	--.95% (-7.35 MB) 💪
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.dll	8.75 MB	8.72 MB	--.32% (-29.00 KB) 💪
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.lib	94.96 KB	94.96 KB	0% (0 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.pdb	25.70 MB	25.61 MB	--.36% (-96.00 KB) 💪
/libdatadog-x64-windows/release/static/datadog_profiling_ffi.lib	51.17 MB	51.00 MB	--.32% (-171.06 KB) 💪

libdatadog-x86-windows

Artifact	Baseline	Commit	Change
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.dll	23.25 MB	23.13 MB	--.50% (-121.00 KB) 💪
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.lib	96.45 KB	96.45 KB	0% (0 B) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.pdb	186.11 MB	184.90 MB	--.65% (-1.21 MB) 💪
/libdatadog-x86-windows/debug/static/datadog_profiling_ffi.lib	756.49 MB	750.97 MB	--.72% (-5.51 MB) 💪
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.dll	6.76 MB	6.73 MB	--.41% (-28.50 KB) 💪
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.lib	96.45 KB	96.45 KB	0% (0 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.pdb	27.64 MB	27.54 MB	--.36% (-104.00 KB) 💪
/libdatadog-x86-windows/release/static/datadog_profiling_ffi.lib	48.71 MB	48.55 MB	--.33% (-165.07 KB) 💪

x86_64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.a	80.03 MB	79.76 MB	--.33% (-277.67 KB) 💪
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.so	9.18 MB	9.15 MB	--.29% (-28.00 KB) 💪

x86_64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.a	95.76 MB	95.48 MB	--.28% (-280.94 KB) 💪
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.so	11.20 MB	11.17 MB	--.25% (-29.72 KB) 💪

This has not much impact in practice, but is observable, and obviously also races against each other, delivering payloads after app closing, which is not that problematic, but could be unexpected.

bwoebi · 2026-08-31T11:54:55Z

/merge

gh-worker-devflow-routing-ef8351 · 2026-08-31T11:54:59Z

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2026-08-31 11:54:59 UTC ℹ️ Start processing command /merge

2026-08-31 11:55:05 UTC ℹ️ MergeQueue: Pull request is not mergeable yet

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2026-08-31 14:55:08 UTC ℹ️ MergeQueue: merge request added to the queue

The expected merge time in main is approximately 49m (p90).

2026-08-31 15:38:53 UTC ℹ️ MergeQueue: This merge request was merged

bwoebi requested a review from a team as a code owner August 28, 2026 17:41

github-actions Bot added the telemetry label Aug 28, 2026

Avoid doing two separate http requests in stop telemetry

02d95f0

This has not much impact in practice, but is observable, and obviously also races against each other, delivering payloads after app closing, which is not that problematic, but could be unexpected.

bwoebi force-pushed the bob/consolidate-stop-telem branch from 34a918e to 02d95f0 Compare August 31, 2026 11:17

bwoebi changed the title ~~Avoid doing two separate http requests in stop telemetry~~ refactor(telemetry): avoid doing two separate http requests in stop telemetry Aug 31, 2026

paullegranddc approved these changes Aug 31, 2026

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gh-worker-dd-devflow-36fce6 Bot added mergequeue-status: waiting mergequeue-status: queued mergequeue-status: in_progress and removed mergequeue-status: waiting mergequeue-status: queued labels Aug 31, 2026

gh-worker-dd-mergequeue-cf854d Bot merged commit c5f3b82 into main Aug 31, 2026
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gh-worker-dd-mergequeue-cf854d Bot deleted the bob/consolidate-stop-telem branch August 31, 2026 15:38

gh-worker-dd-devflow-36fce6 Bot added mergequeue-status: done and removed mergequeue-status: in_progress labels Aug 31, 2026

dd-octo-sts Bot mentioned this pull request Sep 4, 2026

chore(release): proposal for libdd-live-debugger #2468

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refactor(telemetry): avoid doing two separate http requests in stop telemetry - #2435

refactor(telemetry): avoid doing two separate http requests in stop telemetry#2435
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