Hydraw hacks

[noonio]

TODO:

• Fix fixmes

[github-actions]

Transaction 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	2025-11-28 16:42:39.838497765 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	c8a101a5c8ac4816b0dceb59ce31fc2258e387de828f02961d2f2045	2652
νCommit	61458bc2f297fff3cc5df6ac7ab57cefd87763b0b7bd722146a1035c	685
νHead	a1442faf26d4ec409e2f62a685c1d4893f8d6bcbaf7bcb59d6fa1340	14599
μHead	fd173b993e12103cd734ca6710d364e17120a5eb37a224c64ab2b188*	5284
νDeposit	ae01dade3a9c346d5c93ae3ce339412b90a0b8f83f94ec6baa24e30c	1102

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

Init transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	5836	10.19	3.22	0.51
2	6037	12.32	3.89	0.54
3	6239	14.31	4.52	0.57
5	6640	18.58	5.86	0.63
10	7646	29.11	9.17	0.79
43	14282	98.56	30.79	1.80

Commit transaction costs

This uses ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	558	2.44	1.16	0.20
2	743	3.38	1.73	0.22
3	916	4.36	2.33	0.24
5	1282	6.41	3.60	0.28
10	2180	12.13	7.25	0.40
54	10063	98.61	68.52	1.88

CollectCom transaction costs

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	56	524	24.42	7.12	0.42
2	114	640	33.32	9.64	0.52
3	171	747	43.95	12.60	0.63
4	228	858	49.39	14.32	0.69
5	282	969	62.50	17.80	0.83
6	339	1081	70.16	20.07	0.91
7	396	1192	84.31	23.77	1.06
8	451	1303	93.99	26.62	1.16

Cost of Increment Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	1802	24.00	7.62	0.48
2	1924	25.55	8.71	0.50
3	2169	29.30	10.42	0.56
5	2370	31.16	12.28	0.59
10	3228	42.97	18.91	0.78
39	7491	97.50	53.42	1.65

Cost of Decrement Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	663	22.54	7.31	0.41
2	746	24.08	8.40	0.44
3	830	24.09	9.04	0.45
5	1187	29.03	11.77	0.52
10	2105	42.15	18.75	0.72
40	6638	99.16	54.62	1.64

Close transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	647	29.13	8.90	0.48
2	881	29.97	9.84	0.50
3	942	32.76	11.24	0.54
5	1234	36.95	13.76	0.60
10	2078	45.38	19.52	0.75
34	5701	99.82	50.70	1.57

Contest transaction costs

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	675	33.87	10.16	0.53
2	833	35.81	11.37	0.56
3	955	37.87	12.61	0.59
5	1281	42.45	15.23	0.66
10	2021	54.13	21.83	0.83
29	4836	98.10	46.71	1.49

Abort transaction costs

There is some variation due to the random mixture of initial and already committed outputs.

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	5839	26.92	9.05	0.69
2	5864	32.68	10.90	0.75
3	5945	40.51	13.53	0.84
4	6210	51.55	17.35	0.97
5	6312	62.24	20.83	1.08
6	6708	75.46	25.51	1.24
7	6888	84.10	28.34	1.34
8	6991	91.66	30.92	1.42
9	7000	98.70	33.20	1.50

FanOut transaction costs

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 ₳
10	1	57	5868	21.22	7.21	0.63
10	10	570	6175	39.51	14.45	0.85
10	20	1138	6513	60.87	22.83	1.09
10	39	2219	7158	98.93	37.88	1.54

End-to-end benchmark results

This page is intended to collect the latest end-to-end benchmark results produced by Hydra's continuous integration (CI) system from the latest master code.

Please note that these results are approximate as they are currently produced from limited cloud VMs and not controlled hardware. Rather than focusing on the absolute results, the emphasis should be on relative results, such as how the timings for a scenario evolve as the code changes.

Generated at 2025-11-28 16:45:32.138939208 UTC

Baseline Scenario

Number of nodes	1
Number of txs	300
Avg. Confirmation Time (ms)	6.435050250
P99	11.366582949999982ms
P95	6.38401955ms
P50	5.092672ms
Number of Invalid txs	0

Memory data

Time	Used	Free
2025-11-28 16:44:05.457787993 UTC	1351M	2550M
2025-11-28 16:44:06.457791906 UTC	1378M	2522M
2025-11-28 16:44:07.457783496 UTC	1392M	2508M
2025-11-28 16:44:08.457723124 UTC	1402M	2498M
2025-11-28 16:44:09.457722464 UTC	1468M	2404M
2025-11-28 16:44:10.457769446 UTC	1479M	2392M
2025-11-28 16:44:11.457737129 UTC	1484M	2383M
2025-11-28 16:44:12.457776413 UTC	1496M	2368M
2025-11-28 16:44:13.457788021 UTC	1493M	2371M
2025-11-28 16:44:14.457687935 UTC	1490M	2374M
2025-11-28 16:44:15.457749885 UTC	1487M	2377M
2025-11-28 16:44:16.457789202 UTC	1492M	2371M
2025-11-28 16:44:17.457773005 UTC	1492M	2371M
2025-11-28 16:44:18.457812216 UTC	1492M	2371M
2025-11-28 16:44:19.457769251 UTC	1493M	2371M
2025-11-28 16:44:20.457645409 UTC	1493M	2371M
2025-11-28 16:44:21.457763262 UTC	1493M	2370M
2025-11-28 16:44:22.457804044 UTC	1493M	2370M
2025-11-28 16:44:23.457776937 UTC	1493M	2370M
2025-11-28 16:44:24.457759605 UTC	1493M	2370M
2025-11-28 16:44:25.457778343 UTC	1493M	2370M
2025-11-28 16:44:26.457785258 UTC	1493M	2370M
2025-11-28 16:44:27.457809548 UTC	1494M	2369M
2025-11-28 16:44:28.457765916 UTC	1494M	2369M
2025-11-28 16:44:29.457738799 UTC	1493M	2369M
2025-11-28 16:44:30.457767454 UTC	1493M	2369M
2025-11-28 16:44:31.457783135 UTC	1493M	2369M
2025-11-28 16:44:32.457751274 UTC	1493M	2369M
2025-11-28 16:44:33.457787585 UTC	1493M	2369M

Three local nodes

Number of nodes	3
Number of txs	900
Avg. Confirmation Time (ms)	40.151819913
P99	66.61872371ms
P95	58.77870904999999ms
P50	38.326745ms
Number of Invalid txs	0

Memory data

Time	Used	Free
2025-11-28 16:44:45.502018075 UTC	1390M	2510M
2025-11-28 16:44:46.502098656 UTC	1397M	2503M
2025-11-28 16:44:47.501978426 UTC	1397M	2503M
2025-11-28 16:44:48.502018336 UTC	1397M	2502M
2025-11-28 16:44:49.501949408 UTC	1402M	2497M
2025-11-28 16:44:50.50200498 UTC	1403M	2495M
2025-11-28 16:44:51.5020342 UTC	1458M	2413M
2025-11-28 16:44:52.501977867 UTC	1522M	2320M
2025-11-28 16:44:53.502012751 UTC	1585M	2228M
2025-11-28 16:44:54.501995931 UTC	1620M	2192M
2025-11-28 16:44:55.502788696 UTC	1630M	2182M
2025-11-28 16:44:56.503279798 UTC	1660M	2144M
2025-11-28 16:44:57.502840664 UTC	1678M	2116M
2025-11-28 16:44:58.502946806 UTC	1690M	2093M
2025-11-28 16:44:59.502120151 UTC	1706M	2066M
2025-11-28 16:45:00.502861936 UTC	1709M	2056M
2025-11-28 16:45:01.50462004 UTC	1731M	2026M
2025-11-28 16:45:02.502954504 UTC	1735M	2016M
2025-11-28 16:45:03.503298498 UTC	1760M	1983M
2025-11-28 16:45:04.504686838 UTC	1763M	1972M
2025-11-28 16:45:05.503500511 UTC	1773M	1955M
2025-11-28 16:45:06.502318329 UTC	1774M	1945M
2025-11-28 16:45:07.501988877 UTC	1787M	1923M
2025-11-28 16:45:08.502052915 UTC	1789M	1916M
2025-11-28 16:45:09.502023426 UTC	1807M	1897M
2025-11-28 16:45:10.502081684 UTC	1808M	1896M
2025-11-28 16:45:11.502062832 UTC	1812M	1891M
2025-11-28 16:45:12.501990265 UTC	1812M	1891M
2025-11-28 16:45:13.502039837 UTC	1812M	1891M
2025-11-28 16:45:14.50198391 UTC	1812M	1891M
2025-11-28 16:45:15.502077915 UTC	1797M	1906M
2025-11-28 16:45:16.502036313 UTC	1798M	1904M
2025-11-28 16:45:17.502074854 UTC	1798M	1904M
2025-11-28 16:45:18.502037612 UTC	1798M	1904M
2025-11-28 16:45:19.502043921 UTC	1798M	1904M
2025-11-28 16:45:20.502000404 UTC	1798M	1904M
2025-11-28 16:45:21.502085081 UTC	1799M	1903M
2025-11-28 16:45:22.5020812 UTC	1799M	1902M
2025-11-28 16:45:23.501996953 UTC	1799M	1902M
2025-11-28 16:45:24.502012683 UTC	1800M	1901M
2025-11-28 16:45:25.501996594 UTC	1800M	1901M
2025-11-28 16:45:26.501970719 UTC	1800M	1901M
2025-11-28 16:45:27.502080964 UTC	1799M	1901M
2025-11-28 16:45:28.50196097 UTC	1801M	1899M
2025-11-28 16:45:29.501973845 UTC	1801M	1899M
2025-11-28 16:45:30.501958704 UTC	1800M	1899M
2025-11-28 16:45:31.502057139 UTC	1800M	1899M

[github-actions]

Transaction cost differences

No cost or size differences found