Application benchmarks

CPU: Intel(R) Xeon(R) Platinum 8370C CPU @ 2.80GHz · 4 logical CPUs
OS: Linux-6.17.0-1022-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 14m 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 · 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)
c118a07be91b6e0c510e06212fa0cdc3d49841545d55a574d55beff35417ed1d

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
1.56	1.56	12.4	22.2

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	569 / 566	567 / 570	125 / 123	23.1 / 18.6
portfolio_risk	99.6 / 99.5	86.2 / 85.7	87.6 / 86.6	18.8 / 14.9
game_fannkuch	n/a	n/a	442 / 443	94.6 / 93.3
game_spectral_norm	497 / 499	451 / 452	119 / 118	28.5 / 25.6
expense_report	0.39 / 0.31	0.45 / 0.33	1.79 / 0.51	0.45 / 0.51
perf_float	340 / 321	411 / 369	89.5 / 87.6	26.4 / 22.7
order_cleanup	0.47 / 0.35	0.52 / 0.41	1.80 / 0.58	0.51 / 0.62
api_report	0.76 / 0.48	0.83 / 0.49	1.86 / 0.58	0.51 / 0.58
capacity_planning	54.0 / 52.3	51.4 / 49.8	16.1 / 14.2	4.45 / 4.15
perf_json_loads	1.59 / 1.25	1.69 / 1.40	3.29 / 2.00	1.29 / 1.41
text_json_parse_medium	13.5 / 11.6	14.9 / 12.9	15.5 / 14.5	6.77 / 7.90
stdout_lines	3.19 / 3.29	3.63 / 3.68	6.50 / 4.80	6.14 / 4.61
memory_customer_records	483 / 450	490 / 432	281 / 287	150 / 161
perf_barnes_hut	5320 / 5350	5740 / 5770	1060 / 1060	580 / 648
game_regex_dna	n/a	failed / failed	314 / 309	235 / 172
memory_string_list_short	283 / 257	268 / 238	161 / 151	97.1 / 148
memory_string_list_long	381 / 358	367 / 330	172 / 163	114 / 197
text_json_transform_medium	17.0 / 14.9	18.5 / 16.2	16.8 / 16.2	11.3 / 12.0
perf_json_dumps	13.0 / 12.0	14.8 / 13.1	18.6 / 17.0	26.4 / 18.3
text_json_lines_medium	18.5 / 17.9	20.4 / 20.2	26.3 / 25.2	19.2 / 19.6
text_csv_aggregate_medium	518 / 510	546 / 537	123 / 119	94.3 / 87.0
game_meteor_contest	n/a	failed / failed	119 / 117	100 / 93.2
text_json_lines_small	0.88 / 0.62	0.96 / 0.70	0.75 / 0.77	1.00 / 0.79
memory_string_index_short	151 / 140	158 / 136	130 / 122	118 / 105
text_line_logs_small	0.51 / 0.48	0.58 / 0.52	0.52 / 0.54	0.91 / 0.67
text_json_transform_small	0.84 / 0.61	0.90 / 0.61	0.64 / 0.66	0.81 / 0.64
text_csv_cleanup_medium	1030 / 1010	1080 / 1060	231 / 229	217 / 211
game_pidigits	n/a	n/a	204 / 204	194 / 189
memory_string_index_long	202 / 185	218 / 186	142 / 133	138 / 126
text_json_parse_small	0.72 / 0.48	0.76 / 0.50	0.45 / 0.47	0.64 / 0.54
text_regex_logs_medium	33.8 / 33.0	35.4 / 34.4	24.2 / 22.9	31.0 / 25.3
text_line_logs_medium	22.0 / 22.5	23.2 / 23.1	13.9 / 12.7	16.9 / 16.9
text_regex_logs_small	1.35 / 0.97	1.34 / 0.99	0.86 / 0.71	2.42 / 1.02
ticket_search	35.1 / 33.7	35.9 / 34.6	13.9 / 10.9	24.2 / 21.9
text_csv_aggregate_small	5.57 / 5.34	5.89 / 5.70	2.30 / 2.27	8.58 / 8.01
perf_unpack_sequence	332 / 334	355 / 363	24.3 / 22.2	58.0 / 52.7
text_csv_cleanup_small	10.3 / 9.99	10.8 / 10.6	3.36 / 3.33	19.4 / 14.6

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_unpack_sequence	19.9	20.0	20.1	78.9
perf_json_loads	20.0	19.9	20.1	67.1
perf_barnes_hut	20.0	20.0	20.1	90.4
order_cleanup	20.0	20.0	20.1	67.1
game_spectral_norm	20.0	20.0	20.0	78.9
stdout_lines	20.0	20.0	20.0	70.6
perf_json_dumps	20.0	20.1	20.1	79.1
ticket_search	20.0	20.0	20.0	79.7
text_csv_aggregate_small	20.1	20.0	20.0	73.8
portfolio_risk	20.1	20.0	20.1	78.5
game_nbody	20.0	20.0	20.1	78.6
text_regex_logs_small	19.9	20.1	20.0	69.4
text_csv_cleanup_small	20.0	20.0	20.0	79.2
text_json_transform_small	19.9	20.0	20.0	69.2
capacity_planning	20.0	20.1	20.1	71.5
api_report	20.1	20.1	20.1	67.1
text_line_logs_small	20.1	20.1	20.1	69.1
text_json_lines_medium	24.8	24.8	24.8	161
text_regex_logs_medium	22.3	22.2	22.2	173
text_line_logs_medium	24.4	24.4	24.3	154
expense_report	20.1	20.1	20.0	67.1
text_json_parse_medium	24.4	24.4	24.3	160
text_json_parse_small	20.1	20.1	20.0	69.2
text_json_lines_small	20.1	20.1	20.0	69.1
text_json_transform_medium	24.4	24.4	24.2	160
memory_string_index_long	67.6	67.7	54.0	141
memory_string_index_short	56.2	56.1	42.4	126
text_csv_cleanup_medium	49.9	49.3	33.9	177
text_csv_aggregate_medium	42.3	41.9	28.0	168
memory_string_list_long	112	112	69.8	145
memory_string_list_short	89.4	89.9	46.6	113
perf_float	57.7	57.4	29.3	84.5
memory_customer_records	157	157	68.1	152
game_fannkuch	n/a	n/a	20.0	78.6
game_pidigits	n/a	n/a	20.0	80.0
game_meteor_contest	n/a	failed	19.9	80.2
game_regex_dna	n/a	failed	20.0	111