Application benchmarks

CPU: AMD EPYC 7763 64-Core Processor · 4 logical CPUs
OS: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 16m 47s

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 · 56949a4c45f51cedc7a96450782f58a8017e114d
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@56949a4c45f51cedc7a96450782f58a8017e114d; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.0 (b940084d7 2026-09-28)
6f979f2265a947d1ef80bb1c82ded4f7334b0b46cedecb56cd6e70f7bf290b6d

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
1.78	1.66	13.0	24.1

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	793 / 792	562 / 562	140 / 137	19.2 / 19.1
portfolio_risk	151 / 150	116 / 115	88.4 / 85.6	12.4 / 13.2
game_spectral_norm	710 / 707	542 / 543	142 / 136	22.6 / 22.6
game_fannkuch	n/a	n/a	455 / 457	87.4 / 88.0
perf_float	387 / 347	471 / 406	96.0 / 90.2	24.3 / 19.9
expense_report	0.40 / 0.34	0.44 / 0.35	1.76 / 0.55	0.44 / 0.58
capacity_planning	77.0 / 75.1	62.6 / 60.7	18.1 / 16.0	4.37 / 4.49
order_cleanup	0.47 / 0.39	0.55 / 0.41	1.81 / 0.58	0.52 / 0.63
api_report	0.83 / 0.47	0.89 / 0.44	1.78 / 0.60	0.50 / 0.63
perf_json_loads	1.61 / 1.13	1.78 / 1.32	3.42 / 2.05	1.27 / 1.33
game_regex_dna	n/a	failed / failed	344 / 331	217 / 152
stdout_lines	3.60 / 3.48	4.05 / 4.16	7.00 / 4.84	6.56 / 4.78
memory_string_list_short	322 / 277	297 / 249	160 / 153	83.9 / 101
perf_barnes_hut	6940 / 6960	7160 / 7150	1250 / 1230	711 / 682
text_csv_aggregate_medium	584 / 553	685 / 651	136 / 129	96.4 / 72.2
memory_customer_records	607 / 549	566 / 495	257 / 250	201 / 146
perf_json_dumps	14.0 / 11.3	17.2 / 14.4	19.0 / 16.8	23.7 / 19.7
text_json_parse_medium	14.9 / 10.7	16.9 / 12.7	15.6 / 13.0	10.6 / 10.4
memory_string_list_long	438 / 388	417 / 349	173 / 165	120 / 147
memory_string_index_short	150 / 118	146 / 110	111 / 94.6	106 / 65.9
text_json_lines_medium	20.1 / 19.2	22.4 / 21.5	26.8 / 25.2	19.0 / 19.0
game_meteor_contest	n/a	failed / failed	122 / 118	91.8 / 86.7
text_json_lines_small	0.93 / 0.61	0.99 / 0.66	0.78 / 0.82	0.72 / 0.79
text_csv_cleanup_medium	1150 / 1090	1360 / 1310	260 / 252	195 / 189
text_json_transform_small	0.87 / 0.51	1.00 / 0.58	0.68 / 0.68	0.55 / 0.65
text_json_parse_small	0.75 / 0.42	0.81 / 0.46	0.47 / 0.48	0.39 / 0.53
game_pidigits	n/a	n/a	205 / 204	177 / 174
text_line_logs_small	0.58 / 0.51	0.59 / 0.58	0.55 / 0.57	0.60 / 0.68
text_json_transform_medium	18.1 / 13.5	20.4 / 15.6	17.0 / 14.3	15.8 / 14.8
text_regex_logs_medium	38.6 / 37.4	37.7 / 36.5	25.2 / 23.5	28.6 / 22.0
memory_string_index_long	215 / 170	219 / 162	123 / 105	119 / 98.2
text_line_logs_medium	27.2 / 26.5	25.1 / 24.2	13.6 / 12.5	17.3 / 16.5
text_regex_logs_small	1.44 / 0.97	1.50 / 0.95	0.91 / 0.74	2.59 / 0.97
ticket_search	41.5 / 39.6	36.9 / 34.8	14.2 / 11.2	20.4 / 19.1
perf_unpack_sequence	338 / 346	104 / 103	25.9 / 23.0	58.0 / 57.1
text_csv_aggregate_small	6.37 / 6.05	7.43 / 7.00	2.52 / 2.41	8.35 / 8.27
text_csv_cleanup_small	11.8 / 11.3	13.9 / 13.4	3.88 / 3.70	14.8 / 15.2

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
perf_barnes_hut	20.0	19.9	20.0	88.7
text_json_transform_small	19.9	20.0	20.0	57.9
capacity_planning	19.9	20.0	20.0	58.2
portfolio_risk	20.0	19.9	20.0	58.5
perf_json_dumps	19.9	20.0	19.9	60.6
order_cleanup	19.9	20.0	19.9	57.4
api_report	20.0	19.9	19.9	57.4
text_line_logs_small	20.0	19.9	20.0	57.8
text_json_parse_medium	24.3	24.4	24.3	126
text_regex_logs_small	19.9	19.9	19.9	58.2
game_spectral_norm	20.0	19.9	19.9	59.1
text_json_lines_small	20.0	19.9	19.9	57.9
expense_report	19.9	19.9	19.9	57.4
ticket_search	19.9	20.0	19.9	60.1
text_csv_aggregate_small	19.9	20.0	19.9	58.6
text_line_logs_medium	24.3	24.4	24.3	125
game_nbody	19.9	20.0	19.9	58.8
text_json_transform_medium	24.2	24.4	24.2	126
perf_unpack_sequence	20.0	20.0	19.9	62.9
perf_json_loads	20.0	20.0	19.9	57.5
text_json_parse_small	20.0	20.0	19.9	57.9
text_csv_cleanup_small	20.0	20.0	19.9	59.2
text_regex_logs_medium	22.2	22.2	22.1	127
stdout_lines	20.0	20.0	19.9	59.4
text_json_lines_medium	24.8	24.9	24.7	124
memory_string_index_long	67.5	67.7	54.0	124
memory_string_index_short	56.1	56.3	42.3	108
text_csv_cleanup_medium	49.9	49.1	33.8	147
text_csv_aggregate_medium	42.1	41.9	28.0	149
memory_string_list_long	112	113	69.7	125
memory_string_list_short	89.4	89.7	46.5	99.4
perf_float	57.6	57.7	29.4	69.9
memory_customer_records	156	157	68.0	134
game_fannkuch	n/a	n/a	20.0	58.7
game_meteor_contest	n/a	failed	19.9	61.0
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	n/a	failed	20.0	87.2