Application benchmarks

CPU: AMD EPYC 9V74 80-Core Processor · 4 logical CPUs
OS: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 14m 16s

Measurement details

Repeated warmups: 3
Timing: Median ms · one-shot / repeated · startup excluded
RSS: Median MiB · separate one-shot processes including startup
Startup: Empty -c command · launch through exit · normal defaults
Sort: Percentage advantage vs chart reference · largest improvement first; click headers to reorder

Monty 1.1.0 · @main: Monty 1.1.0 · Python 3.15: CPython 3.15.0 · PyPy 8.0.0

Runtimes and build details

monty · monty · 1.1.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.1.0; source revision and compiler flags unverified
c9d19e7256886558c67678582d0d223de3eb05232f69da9da657ab9e090f3f35

monty-main · monty · 3c91e83cde78240b410bbbd30bfd877f1a4c07f0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@3c91e83cde78240b410bbbd30bfd877f1a4c07f0; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.0 (b940084d7 2026-09-28)
94fa39fa431d462d22a95078c4fda57a583af7a619f171a73ce3a1e88a81659f

python3.15 · cpython · Python 3.15.0
/opt/hostedtoolcache/Python/3.15.0/x64/bin/python3.15
Source revision and compiler flags unverified
fd580ad81787ecc7e71f91543dbe52ffccd3e5c4cf286565eceb539081e85992

pypy · pypy · Python 3.11.16 (78565394c9b5, Sep 18 2026, 08:00:14) [PyPy 8.0.0 with GCC 14.2.1 20250110 (Red Hat 14.2.1-11)]
/opt/hostedtoolcache/PyPy/3.11.16/x64/bin/pypy3.11
Source revision and compiler flags unverified
7aebd6513a8f1dc8529abecf80d25b66951ddb5e9bab14b2750a7dab7947a94d

Chart baseline

Process startup · ms

Monty	@main	Python 3.15	PyPy
1.50	1.45	11.0	20.6

Runtime · ms · one-shot / repeated

Bars: Python 3.15 = midpoint · blue above = faster, red below = slower · shared asinh scale (5% transition)

Workload	Monty	@main	Python 3.15	PyPy
game_nbody	654 / 653	615 / 618	133 / 111	15.0 / 15.7
portfolio_risk	122 / 123	96.0 / 95.7	78.4 / 67.9	10.6 / 11.3
game_spectral_norm	622 / 621	519 / 517	112 / 106	18.1 / 17.5
game_fannkuch	n/a	n/a	361 / 353	76.9 / 77.0
capacity_planning	63.7 / 62.0	53.5 / 51.9	16.0 / 13.2	3.52 / 3.52
expense_report	0.36 / 0.28	0.42 / 0.31	1.44 / 0.44	0.32 / 0.45
api_report	0.70 / 0.37	0.80 / 0.40	1.47 / 0.50	0.36 / 0.54
order_cleanup	0.40 / 0.29	0.47 / 0.36	1.50 / 0.51	0.38 / 0.54
perf_float	322 / 285	391 / 334	79.6 / 75.0	20.0 / 19.1
perf_json_loads	1.32 / 0.93	1.52 / 1.10	2.80 / 1.63	0.96 / 1.17
perf_barnes_hut	5670 / 5690	6160 / 6220	1070 / 969	541 / 451
game_regex_dna	n/a	failed / failed	289 / 273	176 / 131
stdout_lines	2.87 / 2.54	3.02 / 3.26	5.61 / 3.62	5.12 / 3.75
memory_string_list_short	269 / 231	268 / 217	133 / 121	73.3 / 79.1
memory_customer_records	542 / 485	513 / 408	211 / 207	169 / 115
text_csv_aggregate_medium	503 / 488	528 / 516	106 / 103	79.7 / 61.0
memory_string_index_short	131 / 110	131 / 108	87.6 / 80.8	91.9 / 53.4
text_json_lines_medium	16.1 / 15.8	17.7 / 17.4	21.3 / 20.0	14.5 / 15.0
text_json_parse_medium	12.7 / 9.03	15.1 / 11.4	12.1 / 9.92	8.58 / 8.09
perf_json_dumps	11.4 / 9.21	13.6 / 11.2	14.8 / 12.9	17.8 / 13.3
text_json_lines_small	0.78 / 0.46	0.83 / 0.52	0.63 / 0.63	0.58 / 0.62
memory_string_list_long	371 / 332	356 / 288	144 / 131	104 / 102
game_meteor_contest	n/a	failed / failed	97.6 / 92.1	71.8 / 70.5
text_csv_cleanup_medium	970 / 965	1030 / 1040	200 / 199	154 / 148
text_json_transform_small	0.75 / 0.43	0.82 / 0.48	0.53 / 0.53	0.40 / 0.51
text_json_parse_small	0.64 / 0.32	0.69 / 0.37	0.37 / 0.37	0.29 / 0.39
game_pidigits	n/a	n/a	171 / 170	151 / 150
memory_string_index_long	188 / 154	189 / 149	96.5 / 93.1	104 / 85.7
text_json_transform_medium	15.8 / 11.9	17.7 / 13.9	13.0 / 11.5	12.7 / 12.2
text_line_logs_small	0.46 / 0.42	0.50 / 0.47	0.43 / 0.42	0.45 / 0.53
text_regex_logs_medium	30.0 / 28.8	29.1 / 27.8	18.8 / 17.2	22.2 / 17.7
text_regex_logs_small	1.19 / 0.76	1.24 / 0.78	0.71 / 0.58	2.01 / 0.80
ticket_search	34.2 / 33.1	36.0 / 34.6	11.7 / 9.32	16.0 / 15.6
text_line_logs_medium	21.1 / 20.7	21.4 / 21.0	10.2 / 9.08	14.0 / 13.1
perf_unpack_sequence	283 / 284	302 / 298	20.7 / 19.3	47.1 / 47.5
text_csv_aggregate_small	5.38 / 5.07	5.68 / 5.42	2.05 / 1.95	6.29 / 6.60
text_csv_cleanup_small	9.80 / 9.50	10.5 / 10.2	3.12 / 2.93	11.3 / 11.9

Peak RSS · MiB · one-shot

Bars: Python 3.15 = midpoint · blue above = less memory, red below = more memory · shared asinh scale (5% transition)

Workload	Monty	@main	Python 3.15	PyPy
capacity_planning	20.0	19.9	20.1	58.2
text_json_lines_small	20.0	19.9	20.1	58.0
game_spectral_norm	20.0	19.9	20.0	59.2
order_cleanup	20.0	20.0	20.0	57.5
text_json_transform_medium	24.3	24.3	24.4	126
api_report	20.0	20.1	20.1	57.5
text_json_lines_medium	24.9	24.8	24.8	124
ticket_search	20.1	20.0	20.1	60.3
game_nbody	20.0	20.0	20.1	58.8
perf_json_dumps	20.0	20.1	20.0	60.7
perf_json_loads	20.0	20.1	20.1	57.6
expense_report	20.0	20.1	20.1	57.4
portfolio_risk	20.0	20.0	20.1	58.5
text_json_parse_medium	24.4	24.4	24.4	126
text_csv_cleanup_small	20.0	20.0	20.0	59.2
text_json_transform_small	20.1	20.0	20.1	57.9
text_regex_logs_medium	22.3	22.3	22.3	128
text_json_parse_small	20.0	20.1	20.1	57.9
perf_barnes_hut	20.1	20.0	20.0	88.9
text_regex_logs_small	20.1	20.0	20.1	58.2
text_line_logs_medium	24.4	24.3	24.3	125
perf_unpack_sequence	20.0	20.1	19.9	63.0
text_line_logs_small	20.0	20.1	19.9	57.9
text_csv_aggregate_small	20.1	20.1	20.0	58.7
stdout_lines	20.1	20.1	20.0	59.4
memory_string_index_long	67.5	67.7	54.0	124
memory_string_index_short	56.0	56.3	42.4	108
text_csv_cleanup_medium	49.9	49.5	33.9	147
text_csv_aggregate_medium	42.3	41.9	28.1	149
memory_string_list_long	112	113	69.8	125
memory_string_list_short	89.7	90.0	46.5	99.6
memory_customer_records	157	157	68.1	134
perf_float	57.8	57.8	29.4	70.0
game_fannkuch	n/a	n/a	20.0	58.7
game_meteor_contest	n/a	failed	20.0	60.9
game_pidigits	n/a	n/a	20.1	64.9
game_regex_dna	n/a	failed	20.1	87.2