fix(shared-runtime): allow disabling worker fork restart by juanjux · Pull Request #2464 · DataDog/libdatadog

juanjux · 2026-09-04T07:30:31Z

What does this PR do?

Adds WorkerHandle::set_fork_restart(bool), allowing integrations to control whether an existing worker restarts in a fork child without stopping it.

Motivation

Python-managed and native forks require different worker behavior. Before a Python fork, ddtrace must configure the telemetry worker so the child drops its inherited copy without running shutdown logic. The parent then restores normal native-fork restart behavior.

Changing this policy before the fork avoids locking or mutating the inherited worker registry in the child.

Additional Notes

The dependent ddtrace-py change requires this API and a libdatadog release containing it.

How to test the change?

cargo fmt --all -- --check
cargo check -p libdd-shared-runtime --all-targets --all-features
Tests cover dropping a worker without shutdown when child restart is disabled.

chatgpt-codex-connector · 2026-09-04T07:30:49Z

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-04T07:33:23.120020Z	`f747bc8`	PR opened

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datadog-prod-us1-4 · 2026-09-04T07:42:46Z

✅ All CI checks and tests passed.

🎉 All green!

🧪 All tests passed
❄️ No new flaky tests detected

🎯 Code Coverage (details)
• Patch Coverage: 95.83%
• Overall Coverage: 77.10% (-0.01%)

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

🔗 Commit SHA: 0778918 | Docs | View more details | Give us feedback!}

pr-commenter · 2026-09-04T07:57:00Z

Benchmarks

Comparison

Benchmark execution time: 2026-09-04 07:55:05

Comparing candidate commit 0778918 in PR branch juanjux/disable-worker-fork-restart with baseline commit 8134078 in branch main.

📊 Benchmarking dashboard

Found 0 performance improvements and 0 performance regressions! Performance is the same for 25 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	`0778918`	1788507780	juanjux/disable-worker-fork-restart

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	56.324ms	56.729ms ± 0.338ms	56.610ms ± 0.150ms	56.931ms	57.422ms	57.615ms	57.708ms	1.94%	1.110	0.195	0.60%	0.024ms	1	200
trace_buffer/1_senders/10us_delay	throughput	15595.831op/s	15865.511op/s ± 94.051op/s	15898.300op/s ± 42.048op/s	15933.823op/s	15968.273op/s	15975.221op/s	15979.071op/s	0.51%	-1.093	0.151	0.59%	6.650op/s	1	200
trace_buffer/1_senders/1us_delay	execution_time	49.975ms	50.077ms ± 0.033ms	50.079ms ± 0.013ms	50.090ms	50.139ms	50.183ms	50.203ms	0.25%	0.633	1.775	0.07%	0.002ms	1	200
trace_buffer/1_senders/1us_delay	throughput	17927.225op/s	17972.371op/s ± 11.814op/s	17971.531op/s ± 4.644op/s	17977.793op/s	17989.379op/s	17991.159op/s	18009.007op/s	0.21%	-0.626	1.762	0.07%	0.835op/s	1	200
trace_buffer/1_senders/no_delay	execution_time	324.708µs	334.954µs ± 5.499µs	335.340µs ± 2.712µs	337.439µs	340.075µs	348.415µs	387.601µs	15.58%	4.454	40.568	1.64%	0.389µs	1	200
trace_buffer/1_senders/no_delay	throughput	2321975.276op/s	2687612.446op/s ± 41451.767op/s	2683839.923op/s ± 21851.844op/s	2711602.864op/s	2743865.609op/s	2755976.023op/s	2771724.648op/s	3.27%	-3.462	28.966	1.54%	2931.083op/s	1	200
trace_buffer/2_senders/10us_delay	execution_time	56.557ms	57.113ms ± 0.270ms	57.071ms ± 0.202ms	57.344ms	57.560ms	57.719ms	57.761ms	1.21%	0.355	-0.797	0.47%	0.019ms	1	200
trace_buffer/2_senders/10us_delay	throughput	31162.815op/s	31517.078op/s ± 148.925op/s	31539.834op/s ± 111.768op/s	31632.683op/s	31723.913op/s	31774.591op/s	31826.161op/s	0.91%	-0.339	-0.809	0.47%	10.531op/s	1	200
trace_buffer/2_senders/1us_delay	execution_time	50.058ms	50.114ms ± 0.038ms	50.109ms ± 0.020ms	50.128ms	50.183ms	50.226ms	50.339ms	0.46%	1.903	6.903	0.07%	0.003ms	1	200
trace_buffer/2_senders/1us_delay	throughput	35757.910op/s	35918.321op/s ± 26.915op/s	35921.807op/s ± 14.197op/s	35936.146op/s	35950.507op/s	35957.505op/s	35958.122op/s	0.10%	-1.891	6.821	0.07%	1.903op/s	1	200
trace_buffer/2_senders/no_delay	execution_time	853.021µs	904.111µs ± 17.359µs	904.562µs ± 12.422µs	917.173µs	927.106µs	936.729µs	986.505µs	9.06%	0.111	1.931	1.92%	1.227µs	1	200
trace_buffer/2_senders/no_delay	throughput	1824622.367op/s	1991635.139op/s ± 38236.047op/s	1989913.867op/s ± 27256.801op/s	2016855.665op/s	2050425.494op/s	2083625.523op/s	2110147.759op/s	6.04%	0.099	1.430	1.92%	2703.697op/s	1	200
trace_buffer/4_senders/10us_delay	execution_time	57.035ms	57.409ms ± 0.173ms	57.385ms ± 0.112ms	57.544ms	57.719ms	57.805ms	57.881ms	0.86%	0.345	-0.422	0.30%	0.012ms	1	200
trace_buffer/4_senders/10us_delay	throughput	62196.694op/s	62708.336op/s ± 188.869op/s	62733.727op/s ± 122.708op/s	62834.170op/s	62995.397op/s	63084.622op/s	63118.592op/s	0.61%	-0.331	-0.431	0.30%	13.355op/s	1	200
trace_buffer/4_senders/1us_delay	execution_time	50.112ms	50.164ms ± 0.032ms	50.157ms ± 0.015ms	50.175ms	50.239ms	50.257ms	50.280ms	0.24%	1.309	1.780	0.06%	0.002ms	1	200
trace_buffer/4_senders/1us_delay	throughput	71599.653op/s	71764.839op/s ± 46.080op/s	71774.289op/s ± 21.070op/s	71793.880op/s	71822.774op/s	71833.650op/s	71838.847op/s	0.09%	-1.305	1.768	0.06%	3.258op/s	1	200
trace_buffer/4_senders/no_delay	execution_time	2.047ms	2.259ms ± 0.080ms	2.261ms ± 0.056ms	2.317ms	2.382ms	2.429ms	2.452ms	8.46%	-0.162	-0.253	3.53%	0.006ms	1	200
trace_buffer/4_senders/no_delay	throughput	1467904.498op/s	1595540.511op/s ± 56965.053op/s	1592049.399op/s ± 39996.139op/s	1633483.998op/s	1694730.852op/s	1742530.064op/s	1758817.830op/s	10.48%	0.346	-0.122	3.56%	4028.038op/s	1	200
trace_buffer/8_senders/10us_delay	execution_time	57.541ms	57.844ms ± 0.183ms	57.803ms ± 0.126ms	57.980ms	58.217ms	58.279ms	58.293ms	0.85%	0.708	-0.367	0.32%	0.013ms	1	200
trace_buffer/8_senders/10us_delay	throughput	123513.447op/s	124473.579op/s ± 393.403op/s	124561.261op/s ± 271.796op/s	124784.324op/s	124967.882op/s	125092.190op/s	125128.759op/s	0.46%	-0.698	-0.384	0.32%	27.818op/s	1	200
trace_buffer/8_senders/1us_delay	execution_time	50.210ms	50.303ms ± 0.072ms	50.284ms ± 0.033ms	50.332ms	50.459ms	50.531ms	50.541ms	0.51%	1.467	1.917	0.14%	0.005ms	1	200
trace_buffer/8_senders/1us_delay	throughput	142459.018op/s	143131.663op/s ± 203.624op/s	143187.999op/s ± 94.113op/s	143271.791op/s	143348.493op/s	143377.962op/s	143398.806op/s	0.15%	-1.460	1.891	0.14%	14.398op/s	1	200
trace_buffer/8_senders/no_delay	execution_time	5.893ms	6.681ms ± 0.123ms	6.704ms ± 0.058ms	6.757ms	6.822ms	6.882ms	6.943ms	3.57%	-2.016	8.351	1.84%	0.009ms	1	200
trace_buffer/8_senders/no_delay	throughput	1037013.907op/s	1078068.921op/s ± 20747.384op/s	1074064.105op/s ± 9274.354op/s	1085139.092op/s	1113609.122op/s	1136343.136op/s	1221703.080op/s	13.75%	2.409	11.509	1.92%	1467.062op/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	[56.682ms; 56.776ms] or [-0.083%; +0.083%]	None	None	None
trace_buffer/1_senders/10us_delay	throughput	[15852.476op/s; 15878.545op/s] or [-0.082%; +0.082%]	None	None	None
trace_buffer/1_senders/1us_delay	execution_time	[50.072ms; 50.081ms] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/1us_delay	throughput	[17970.734op/s; 17974.008op/s] or [-0.009%; +0.009%]	None	None	None
trace_buffer/1_senders/no_delay	execution_time	[334.192µs; 335.716µs] or [-0.228%; +0.228%]	None	None	None
trace_buffer/1_senders/no_delay	throughput	[2681867.630op/s; 2693357.263op/s] or [-0.214%; +0.214%]	None	None	None
trace_buffer/2_senders/10us_delay	execution_time	[57.076ms; 57.151ms] or [-0.066%; +0.066%]	None	None	None
trace_buffer/2_senders/10us_delay	throughput	[31496.438op/s; 31537.718op/s] or [-0.065%; +0.065%]	None	None	None
trace_buffer/2_senders/1us_delay	execution_time	[50.109ms; 50.119ms] or [-0.010%; +0.010%]	None	None	None
trace_buffer/2_senders/1us_delay	throughput	[35914.591op/s; 35922.052op/s] or [-0.010%; +0.010%]	None	None	None
trace_buffer/2_senders/no_delay	execution_time	[901.706µs; 906.517µs] or [-0.266%; +0.266%]	None	None	None
trace_buffer/2_senders/no_delay	throughput	[1986335.991op/s; 1996934.287op/s] or [-0.266%; +0.266%]	None	None	None
trace_buffer/4_senders/10us_delay	execution_time	[57.385ms; 57.433ms] or [-0.042%; +0.042%]	None	None	None
trace_buffer/4_senders/10us_delay	throughput	[62682.160op/s; 62734.511op/s] or [-0.042%; +0.042%]	None	None	None
trace_buffer/4_senders/1us_delay	execution_time	[50.159ms; 50.168ms] or [-0.009%; +0.009%]	None	None	None
trace_buffer/4_senders/1us_delay	throughput	[71758.453op/s; 71771.225op/s] or [-0.009%; +0.009%]	None	None	None
trace_buffer/4_senders/no_delay	execution_time	[2.248ms; 2.270ms] or [-0.490%; +0.490%]	None	None	None
trace_buffer/4_senders/no_delay	throughput	[1587645.703op/s; 1603435.320op/s] or [-0.495%; +0.495%]	None	None	None
trace_buffer/8_senders/10us_delay	execution_time	[57.819ms; 57.870ms] or [-0.044%; +0.044%]	None	None	None
trace_buffer/8_senders/10us_delay	throughput	[124419.058op/s; 124528.101op/s] or [-0.044%; +0.044%]	None	None	None
trace_buffer/8_senders/1us_delay	execution_time	[50.293ms; 50.313ms] or [-0.020%; +0.020%]	None	None	None
trace_buffer/8_senders/1us_delay	throughput	[143103.442op/s; 143159.883op/s] or [-0.020%; +0.020%]	None	None	None
trace_buffer/8_senders/no_delay	execution_time	[6.664ms; 6.698ms] or [-0.256%; +0.256%]	None	None	None
trace_buffer/8_senders/no_delay	throughput	[1075193.533op/s; 1080944.309op/s] or [-0.267%; +0.267%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`0778918`	1788507780	juanjux/disable-worker-fork-restart

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	9.724ms	9.752ms ± 0.018ms	9.748ms ± 0.011ms	9.763ms	9.786ms	9.805ms	9.812ms	0.66%	0.865	0.138	0.19%	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	[9.750ms; 9.755ms] or [-0.026%; +0.026%]	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	`8134078`	1788478470	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	56.313ms	56.688ms ± 0.276ms	56.593ms ± 0.115ms	56.794ms	57.340ms	57.530ms	57.663ms	1.89%	1.539	1.951	0.48%	0.019ms	1	200
trace_buffer/1_senders/10us_delay	throughput	15607.809op/s	15876.851op/s ± 76.604op/s	15903.042op/s ± 32.359op/s	15927.678op/s	15951.822op/s	15972.068op/s	15982.021op/s	0.50%	-1.517	1.870	0.48%	5.417op/s	1	200
trace_buffer/1_senders/1us_delay	execution_time	49.987ms	50.080ms ± 0.031ms	50.079ms ± 0.012ms	50.089ms	50.141ms	50.163ms	50.198ms	0.24%	0.659	1.386	0.06%	0.002ms	1	200
trace_buffer/1_senders/1us_delay	throughput	17929.034op/s	17971.206op/s ± 11.005op/s	17971.467op/s ± 4.295op/s	17976.508op/s	17988.693op/s	17992.114op/s	18004.552op/s	0.18%	-0.654	1.379	0.06%	0.778op/s	1	200
trace_buffer/1_senders/no_delay	execution_time	327.751µs	335.631µs ± 4.831µs	335.133µs ± 1.484µs	336.796µs	339.564µs	351.150µs	388.605µs	15.96%	7.007	71.708	1.44%	0.342µs	1	200
trace_buffer/1_senders/no_delay	throughput	2315975.613op/s	2682018.415op/s ± 35311.412op/s	2685504.819op/s ± 11836.034op/s	2695304.223op/s	2717407.087op/s	2738844.345op/s	2745991.127op/s	2.25%	-6.021	57.456	1.31%	2496.894op/s	1	200
trace_buffer/2_senders/10us_delay	execution_time	56.616ms	57.087ms ± 0.215ms	57.038ms ± 0.151ms	57.239ms	57.478ms	57.563ms	57.610ms	1.00%	0.495	-0.629	0.38%	0.015ms	1	200
trace_buffer/2_senders/10us_delay	throughput	31244.384op/s	31531.130op/s ± 118.731op/s	31558.158op/s ± 83.425op/s	31631.765op/s	31682.903op/s	31714.222op/s	31793.083op/s	0.74%	-0.482	-0.642	0.38%	8.396op/s	1	200
trace_buffer/2_senders/1us_delay	execution_time	50.031ms	50.114ms ± 0.038ms	50.109ms ± 0.020ms	50.127ms	50.189ms	50.238ms	50.292ms	0.36%	1.597	3.591	0.08%	0.003ms	1	200
trace_buffer/2_senders/1us_delay	throughput	35790.877op/s	35918.388op/s ± 27.471op/s	35921.478op/s ± 14.316op/s	35937.309op/s	35949.352op/s	35956.438op/s	35977.379op/s	0.16%	-1.590	3.562	0.08%	1.943op/s	1	200
trace_buffer/2_senders/no_delay	execution_time	867.848µs	914.153µs ± 15.616µs	915.236µs ± 9.165µs	923.438µs	936.212µs	945.239µs	973.148µs	6.33%	-0.060	1.121	1.70%	1.104µs	1	200
trace_buffer/2_senders/no_delay	throughput	1849667.265op/s	1969609.568op/s ± 33724.543op/s	1966705.497op/s ± 19652.300op/s	1987262.572op/s	2026636.040op/s	2055031.475op/s	2074096.190op/s	5.46%	0.216	1.015	1.71%	2384.685op/s	1	200
trace_buffer/4_senders/10us_delay	execution_time	57.007ms	57.456ms ± 0.167ms	57.464ms ± 0.110ms	57.555ms	57.711ms	57.902ms	57.999ms	0.93%	0.309	0.182	0.29%	0.012ms	1	200
trace_buffer/4_senders/10us_delay	throughput	62069.735op/s	62657.460op/s ± 182.064op/s	62648.009op/s ± 119.612op/s	62793.556op/s	62926.883op/s	62982.491op/s	63149.762op/s	0.80%	-0.291	0.157	0.29%	12.874op/s	1	200
trace_buffer/4_senders/1us_delay	execution_time	50.114ms	50.177ms ± 0.041ms	50.165ms ± 0.020ms	50.195ms	50.259ms	50.302ms	50.383ms	0.43%	1.553	3.343	0.08%	0.003ms	1	200
trace_buffer/4_senders/1us_delay	throughput	71453.020op/s	71746.079op/s ± 58.980op/s	71762.748op/s ± 28.032op/s	71784.407op/s	71811.038op/s	71826.382op/s	71835.609op/s	0.10%	-1.546	3.306	0.08%	4.170op/s	1	200
trace_buffer/4_senders/no_delay	execution_time	2.012ms	2.300ms ± 0.084ms	2.302ms ± 0.048ms	2.349ms	2.431ms	2.471ms	2.512ms	9.16%	-0.385	0.461	3.65%	0.006ms	1	200
trace_buffer/4_senders/no_delay	throughput	1432864.549op/s	1567424.859op/s ± 58460.821op/s	1564188.595op/s ± 32910.993op/s	1597669.185op/s	1676921.443op/s	1723282.765op/s	1789135.141op/s	14.38%	0.650	0.916	3.72%	4133.804op/s	1	200
trace_buffer/8_senders/10us_delay	execution_time	57.557ms	57.872ms ± 0.202ms	57.814ms ± 0.108ms	57.984ms	58.299ms	58.380ms	58.446ms	1.09%	0.975	0.121	0.35%	0.014ms	1	200
trace_buffer/8_senders/10us_delay	throughput	123191.234op/s	124414.871op/s ± 431.997op/s	124538.022op/s ± 233.410op/s	124733.727op/s	124930.578op/s	124998.882op/s	125094.405op/s	0.45%	-0.963	0.095	0.35%	30.547op/s	1	200
trace_buffer/8_senders/1us_delay	execution_time	50.210ms	50.295ms ± 0.064ms	50.273ms ± 0.029ms	50.315ms	50.442ms	50.501ms	50.525ms	0.50%	1.468	1.890	0.13%	0.005ms	1	200
trace_buffer/8_senders/1us_delay	throughput	142503.409op/s	143155.252op/s ± 182.818op/s	143217.416op/s ± 81.898op/s	143275.296op/s	143352.365op/s	143391.113op/s	143397.558op/s	0.13%	-1.461	1.867	0.13%	12.927op/s	1	200
trace_buffer/8_senders/no_delay	execution_time	6.173ms	6.553ms ± 0.092ms	6.562ms ± 0.063ms	6.622ms	6.675ms	6.714ms	6.779ms	3.31%	-0.703	1.066	1.41%	0.007ms	1	200
trace_buffer/8_senders/no_delay	throughput	1062141.211op/s	1099028.169op/s ± 15679.030op/s	1097258.895op/s ± 10597.939op/s	1109228.520op/s	1124727.271op/s	1145945.344op/s	1166458.108op/s	6.31%	0.816	1.421	1.42%	1108.675op/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	[56.649ms; 56.726ms] or [-0.067%; +0.067%]	None	None	None
trace_buffer/1_senders/10us_delay	throughput	[15866.235op/s; 15887.468op/s] or [-0.067%; +0.067%]	None	None	None
trace_buffer/1_senders/1us_delay	execution_time	[50.076ms; 50.084ms] or [-0.008%; +0.008%]	None	None	None
trace_buffer/1_senders/1us_delay	throughput	[17969.680op/s; 17972.731op/s] or [-0.008%; +0.008%]	None	None	None
trace_buffer/1_senders/no_delay	execution_time	[334.962µs; 336.301µs] or [-0.200%; +0.200%]	None	None	None
trace_buffer/1_senders/no_delay	throughput	[2677124.593op/s; 2686912.237op/s] or [-0.182%; +0.182%]	None	None	None
trace_buffer/2_senders/10us_delay	execution_time	[57.057ms; 57.117ms] or [-0.052%; +0.052%]	None	None	None
trace_buffer/2_senders/10us_delay	throughput	[31514.675op/s; 31547.585op/s] or [-0.052%; +0.052%]	None	None	None
trace_buffer/2_senders/1us_delay	execution_time	[50.108ms; 50.119ms] or [-0.011%; +0.011%]	None	None	None
trace_buffer/2_senders/1us_delay	throughput	[35914.580op/s; 35922.195op/s] or [-0.011%; +0.011%]	None	None	None
trace_buffer/2_senders/no_delay	execution_time	[911.988µs; 916.317µs] or [-0.237%; +0.237%]	None	None	None
trace_buffer/2_senders/no_delay	throughput	[1964935.670op/s; 1974283.465op/s] or [-0.237%; +0.237%]	None	None	None
trace_buffer/4_senders/10us_delay	execution_time	[57.433ms; 57.479ms] or [-0.040%; +0.040%]	None	None	None
trace_buffer/4_senders/10us_delay	throughput	[62632.228op/s; 62682.692op/s] or [-0.040%; +0.040%]	None	None	None
trace_buffer/4_senders/1us_delay	execution_time	[50.171ms; 50.183ms] or [-0.011%; +0.011%]	None	None	None
trace_buffer/4_senders/1us_delay	throughput	[71737.905op/s; 71754.253op/s] or [-0.011%; +0.011%]	None	None	None
trace_buffer/4_senders/no_delay	execution_time	[2.288ms; 2.312ms] or [-0.507%; +0.507%]	None	None	None
trace_buffer/4_senders/no_delay	throughput	[1559322.751op/s; 1575526.966op/s] or [-0.517%; +0.517%]	None	None	None
trace_buffer/8_senders/10us_delay	execution_time	[57.844ms; 57.900ms] or [-0.048%; +0.048%]	None	None	None
trace_buffer/8_senders/10us_delay	throughput	[124355.001op/s; 124474.742op/s] or [-0.048%; +0.048%]	None	None	None
trace_buffer/8_senders/1us_delay	execution_time	[50.286ms; 50.304ms] or [-0.018%; +0.018%]	None	None	None
trace_buffer/8_senders/1us_delay	throughput	[143129.916op/s; 143180.589op/s] or [-0.018%; +0.018%]	None	None	None
trace_buffer/8_senders/no_delay	execution_time	[6.540ms; 6.565ms] or [-0.196%; +0.196%]	None	None	None
trace_buffer/8_senders/no_delay	throughput	[1096855.206op/s; 1101201.132op/s] or [-0.198%; +0.198%]	None	None	None

Group 2

cpu_model	git_commit_sha	git_commit_date	git_branch
Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz	`8134078`	1788478470	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	9.716ms	9.747ms ± 0.016ms	9.743ms ± 0.011ms	9.757ms	9.777ms	9.789ms	9.801ms	0.60%	0.725	0.122	0.16%	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	[9.745ms; 9.749ms] or [-0.023%; +0.023%]	None	None	None

dd-octo-sts · 2026-09-04T08:09:53Z

Artifact Size Benchmark Report

aarch64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.so	8.45 MB	8.45 MB	0% (0 B) 👌
/aarch64-alpine-linux-musl/lib/libdatadog_profiling.a	91.32 MB	91.32 MB	+0% (+24 B) 👌

aarch64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.so	11.38 MB	11.38 MB	0% (0 B) 👌
/aarch64-unknown-linux-gnu/lib/libdatadog_profiling.a	102.61 MB	102.61 MB	+0% (+24 B) 👌

libdatadog-x64-windows

Artifact	Baseline	Commit	Change
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.dll	27.32 MB	27.32 MB	0% (0 B) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.lib	96.08 KB	96.08 KB	0% (0 B) 👌
/libdatadog-x64-windows/debug/dynamic/datadog_profiling_ffi.pdb	185.41 MB	185.41 MB	0% (0 B) 👌
/libdatadog-x64-windows/debug/static/datadog_profiling_ffi.lib	804.05 MB	804.07 MB	+0% (+24.82 KB) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.dll	9.00 MB	9.00 MB	0% (0 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.lib	96.08 KB	96.08 KB	0% (0 B) 👌
/libdatadog-x64-windows/release/dynamic/datadog_profiling_ffi.pdb	26.20 MB	26.20 MB	0% (0 B) 👌
/libdatadog-x64-windows/release/static/datadog_profiling_ffi.lib	52.21 MB	52.21 MB	0% (0 B) 👌

libdatadog-x86-windows

Artifact	Baseline	Commit	Change
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.dll	23.82 MB	23.82 MB	0% (0 B) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.lib	97.58 KB	97.58 KB	0% (0 B) 👌
/libdatadog-x86-windows/debug/dynamic/datadog_profiling_ffi.pdb	190.42 MB	190.43 MB	+0% (+8.00 KB) 👌
/libdatadog-x86-windows/debug/static/datadog_profiling_ffi.lib	787.48 MB	787.46 MB	-0% (-26.04 KB) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.dll	6.96 MB	6.96 MB	0% (0 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.lib	97.58 KB	97.58 KB	0% (0 B) 👌
/libdatadog-x86-windows/release/dynamic/datadog_profiling_ffi.pdb	28.19 MB	28.19 MB	0% (0 B) 👌
/libdatadog-x86-windows/release/static/datadog_profiling_ffi.lib	49.70 MB	49.70 MB	0% (0 B) 👌

x86_64-alpine-linux-musl

Artifact	Baseline	Commit	Change
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.a	81.48 MB	81.48 MB	+0% (+16 B) 👌
/x86_64-alpine-linux-musl/lib/libdatadog_profiling.so	9.41 MB	9.41 MB	0% (0 B) 👌

x86_64-unknown-linux-gnu

Artifact	Baseline	Commit	Change
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.a	97.21 MB	97.21 MB	+0% (+16 B) 👌
/x86_64-unknown-linux-gnu/lib/libdatadog_profiling.so	11.46 MB	11.46 MB	0% (0 B) 👌

yannham

I wonder if this will interact with DataDog/dd-trace-py#20015?

fix(shared-runtime): allow disabling worker fork restart

f747bc8

juanjux requested a review from a team as a code owner September 4, 2026 07:30

juanjux mentioned this pull request Sep 4, 2026

fix(telemetry): drop inherited worker after fork DataDog/dd-trace-py#20066

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Merge branch 'main' into juanjux/disable-worker-fork-restart

0778918

yannham approved these changes Sep 4, 2026

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gh-worker-dd-devflow-36fce6 Bot added mergequeue-status: queued mergequeue-status: in_progress and removed mergequeue-status: queued labels Sep 4, 2026

gh-worker-dd-mergequeue-cf854d Bot merged commit 48e990d into main Sep 4, 2026
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gh-worker-dd-devflow-36fce6 Bot removed the mergequeue-status: in_progress label Sep 4, 2026

gh-worker-dd-mergequeue-cf854d Bot deleted the juanjux/disable-worker-fork-restart branch September 4, 2026 10:53

gh-worker-dd-devflow-36fce6 Bot added the mergequeue-status: done label Sep 4, 2026

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

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

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fix(shared-runtime): allow disabling worker fork restart - #2464

fix(shared-runtime): allow disabling worker fork restart#2464
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