Bump GHC further to 9.2.8

[ch1bo]

This is a patch release ahead of previously 9.2.7 and promises better support for newer linux kernels.

Note that this is producing the exact same scripts as plutus-tx with 9.2.7 and hence is no breaking change over current master.

---

• CHANGELOG updated or not needed (GHC update already in there)
• Documentation updated or not needed
• Haddocks updated or not needed
• No new TODOs introduced or explained herafter

[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	2023-07-28 18:53:08.503627104 UTC
Max. memory units	14000000
Max. CPU units	10000000000
Max. tx size (kB)	16384

Script summary

Name	Hash	Size (Bytes)
νInitial	7ceb53f05e444cfdabfd0a37a0590090066da457a1f1db30d613b8bd	4289
νCommit	70e70fc13217bfde96932956656c1d540a743b1588c845ca09dc3723	2124
νHead	cda51d313c1c8285b6925ce2413def012db27f544e2bbd79b8173000	9185
μHead	1c0b665fc49bc2e9e2ce4e8252c8f37fe84dd75bd8e086abfdb92685*	4149

• 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	4743	13.81	5.39	0.51
2	4948	16.96	6.60	0.55
3	5156	18.67	7.23	0.58
5	5560	22.86	8.79	0.64
10	6589	34.06	12.99	0.81
36	11924	98.25	37.21	1.74

Cost of Commit Transaction

This is using ada-only outputs for better comparability.

UTxO	Tx size	% max Mem	% max CPU	Min fee ₳
1	599	14.97	5.73	0.34
2	784	19.66	7.73	0.40
3	974	24.76	9.87	0.46
5	1348	36.19	14.60	0.61
10	2285	71.91	28.91	1.04
13	2838	98.24	39.22	1.35

Cost of CollectCom Transaction

Parties	UTxO (bytes)	Tx size	% max Mem	% max CPU	Min fee ₳
1	57	814	27.96	10.85	0.49
2	113	1134	43.64	17.06	0.68
3	170	1455	62.29	24.50	0.89
4	227	1777	82.53	32.60	1.13

Cost of Close Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	635	18.98	8.46	0.39
2	804	20.08	9.60	0.42
3	970	21.48	10.85	0.44
5	1296	24.27	13.37	0.50
10	2132	31.27	19.66	0.64
50	8733	87.55	70.11	1.75

Cost of Contest Transaction

Parties	Tx size	% max Mem	% max CPU	Min fee ₳
1	676	24.87	10.67	0.46
2	832	26.16	11.87	0.48
3	1015	28.31	13.41	0.52
5	1327	31.32	15.99	0.58
10	2161	40.34	23.01	0.74
44	7772	98.80	69.64	1.79

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	4856	22.60	9.44	0.61
2	5179	37.05	15.68	0.79
3	5499	54.19	23.12	1.00
4	5818	73.86	31.70	1.23
5	6140	97.75	42.05	1.51

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	4761	8.72	3.59	0.46
5	1	57	4802	10.12	4.41	0.48
5	5	285	4941	15.71	7.72	0.55
5	10	569	5124	22.69	11.85	0.64
5	20	1139	5484	36.67	20.11	0.83
5	30	1709	5848	50.65	28.38	1.02
5	40	2276	6200	64.63	36.65	1.21
5	50	2848	6561	78.62	44.92	1.40
5	65	3702	7105	99.62	57.34	1.68

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 2023-07-28 18:45:36.113992758 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)	146.599817185
P99	275.04050635999994ms
P95	217.54940029999995ms
P50	137.4571185ms
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)	9.954522250
P99	21.029815079999988ms
P95	17.645915100000003ms
P50	8.6086665ms
Number of Invalid txs	0

[github-actions]

Test Results

350 tests  ±0   345 ✔️ ±0   23m 43s ⏱️ + 4m 38s
117 suites ±0       5 💤 ±0 
    6 files   ±0       0 ❌ ±0 

Results for commit e7f3515. ± Comparison against base commit 52dac61.

♻️ This comment has been updated with latest results.