Monthly report November 2023

[ch1bo]

Report of the last month with only a few sections beside the usual roadmap update.

---

• CHANGELOG updated or not needed
• Documentation updated or not needed
• Haddocks updated or not needed
• No new TODOs introduced or explained herafter

[github-actions]

Test Results

373 tests  ±0   368 ✔️ ±0   20m 39s ⏱️ -43s
127 suites ±0       5 💤 ±0 
    5 files   ±0       0 ❌ ±0 

Results for commit 48efff6. ± Comparison against base commit d6ef7a0.

♻️ This comment has been updated with latest results.

[github-actions]

Transactions Costs

Sizes and execution budgets for Hydra protocol transactions. Note that unlisted parameters are currently using arbitrary values and results are not fully deterministic and comparable to previous runs.

Metadata
Generated at	2023-12-04 13:01:58.767382514 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	4868d5365af5120ae0b3c93b819d3452a3cbdcc98595da2a7ae765b5	4069
νCommit	171a1e6bdbc8aa96d957a65b3f505517386af06ba265e3f784741f67	2050
νHead	e89b0c4a6155bac2434d1e500bd49c155b2b56744ccf5a0efa72a82e	9092
μHead	6849328242b5912ad218f134378e6baff11f3e74f7e36dcf8e13d53e*	4062

• The minting policy hash is only usable for comparison. As the script is parameterized, the actual script is unique per Head.

Cost of Init Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	4585	11.01	4.37	0.47
2	4786	13.13	5.18	0.50
3	4987	15.35	6.02	0.54
5	5388	19.85	7.74	0.60
10	6393	30.97	11.99	0.77
41	12628	99.61	38.18	1.79

Cost of Commit Transaction

This is using ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	534	12.22	4.81	0.31
2	721	15.93	6.48	0.36
3	911	19.77	8.20	0.41
5	1284	27.87	11.80	0.52
10	2223	50.58	21.69	0.81
18	3728	94.20	40.16	1.36

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	484	22.24	8.89	0.42
2	114	590	35.64	14.32	0.57
3	169	700	50.50	20.42	0.74
4	227	810	64.62	26.35	0.90
5	283	920	85.65	34.95	1.13

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	568	17.76	8.36	0.38
2	714	19.56	9.98	0.41
3	942	21.19	11.60	0.45
5	1277	24.47	14.73	0.51
10	2237	32.98	22.77	0.68
50	8995	96.89	83.65	1.93

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	570	21.37	9.71	0.42
2	789	23.18	11.39	0.45
3	903	24.73	12.74	0.48
5	1309	28.88	16.41	0.56
10	2183	38.07	24.60	0.73
45	8057	99.76	79.92	1.89

Cost of Abort Transaction

Some variation because of random mixture of still initial and already committed outputs.

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	4528	20.10	8.74	0.57
2	4689	33.57	14.79	0.73
3	4858	50.81	22.49	0.94
4	5057	70.38	31.26	1.17
5	5238	92.34	41.12	1.42

Cost of FanOut Transaction

Involves spending head output and burning head tokens. Uses ada-only UTxO for better comparability.

Parties	UTxO	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
5	0	0	4417	8.98	3.78	0.44
5	1	56	4451	10.37	4.61	0.46
5	5	282	4594	15.56	7.79	0.53
5	10	566	4772	22.18	11.81	0.62
5	20	1138	5134	35.16	19.75	0.80
5	30	1706	5495	47.77	27.55	0.98
5	40	2276	5855	60.99	35.59	1.16
5	50	2845	6213	73.98	43.55	1.34
5	70	3983	6932	99.87	59.42	1.69

End-To-End Benchmark Results

This page is intended to collect the latest end-to-end benchmarks results produced by Hydra's Continuous Integration system from the latest master code.

Please take those results with a grain of salt as they are currently produced from very limited cloud VMs and not controlled hardware. Instead of focusing on the absolute results, the emphasis should be on relative results, eg. how the timings for a scenario evolve as the code changes.

Generated at 2023-12-04 12:54:32.913417241 UTC

3-nodes Scenario

A rather typical setup, with 3 nodes forming a Hydra head.

Number of nodes	3
Number of txs	900
Avg. Confirmation Time (ms)	26.556535605
P99	126.74550861ms
P95	35.08760024999998ms
P50	20.640074ms
Number of Invalid txs	0

Baseline Scenario

This scenario represents a minimal case and as such is a good baseline against which to assess the overhead introduced by more complex setups. There is a single hydra-node d with a single client submitting single input and single output transactions with a constant UTxO set of 1.

Number of nodes	1
Number of txs	300
Avg. Confirmation Time (ms)	4.041028066
P99	5.260613269999994ms
P95	4.86475085ms
P50	3.9277745ms
Number of Invalid txs	0

[ghost]

You can use this URL which is an IPFS-published version of the GIF: https://gateway.pinata.cloud/ipfs/QmPUTYaSViLEyZcGmsTPL4jHdGSevH3yc3RD7TRhU3ivwH

[ghost]

@olgahryniuk @NeilBurgess42 I applied your change, could you approve so that we can publish?

[NeilBurgess42]

I have left some first-person plural references in the conclusion because the intent is clear.