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 40s

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 · 64c44b814ddf718af9d6193784be776d65e05882
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@64c44b814ddf718af9d6193784be776d65e05882; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.0 (b940084d7 2026-09-28)
35cf2dde84047d9a2273fc65575e359e1f69eab2d654aaf4a67e44affaf210fc

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
1.69	1.62	13.0	23.8

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	786 / 783	556 / 560	140 / 137	19.3 / 19.5
portfolio_risk	154 / 154	118 / 118	87.5 / 85.7	12.4 / 13.1
game_spectral_norm	700 / 710	528 / 529	142 / 137	22.8 / 22.0
game_fannkuch	n/a	n/a	461 / 465	87.9 / 89.4
expense_report	0.39 / 0.34	0.46 / 0.33	1.76 / 0.54	0.44 / 0.51
capacity_planning	77.1 / 75.9	65.2 / 63.0	18.7 / 16.6	4.30 / 4.36
perf_float	385 / 345	475 / 410	96.6 / 90.9	24.3 / 22.1
order_cleanup	0.45 / 0.36	0.52 / 0.40	1.82 / 0.58	0.50 / 0.66
api_report	0.82 / 0.43	0.87 / 0.47	1.81 / 0.59	0.49 / 0.63
perf_json_loads	1.62 / 1.15	1.78 / 1.37	3.38 / 2.09	1.26 / 1.38
game_regex_dna	n/a	failed / failed	345 / 329	216 / 156
perf_barnes_hut	6860 / 6760	7000 / 6970	1250 / 1240	708 / 652
memory_string_list_short	314 / 283	303 / 256	160 / 154	84.1 / 100
stdout_lines	3.83 / 2.98	4.16 / 4.10	6.93 / 4.84	6.46 / 4.78
text_csv_aggregate_medium	591 / 563	657 / 638	136 / 131	96.5 / 75.3
memory_customer_records	591 / 530	581 / 522	259 / 254	201 / 146
memory_string_index_short	145 / 120	149 / 124	110 / 102	104 / 65.5
text_json_parse_medium	14.9 / 10.7	16.6 / 12.6	15.7 / 13.1	10.6 / 9.97
perf_json_dumps	14.0 / 11.4	16.4 / 13.9	18.8 / 16.9	23.5 / 19.7
memory_string_list_long	430 / 399	421 / 379	173 / 166	119 / 155
text_json_lines_medium	20.5 / 19.7	22.2 / 21.1	26.7 / 25.2	18.8 / 19.2
text_json_lines_small	0.93 / 0.58	0.97 / 0.66	0.78 / 0.80	0.74 / 0.77
text_csv_cleanup_medium	1160 / 1110	1320 / 1290	261 / 254	193 / 187
game_meteor_contest	n/a	failed / failed	123 / 118	91.1 / 88.3
text_json_transform_small	0.88 / 0.54	0.96 / 0.59	0.68 / 0.70	0.54 / 0.64
text_json_parse_small	0.76 / 0.44	0.83 / 0.48	0.47 / 0.50	0.39 / 0.51
game_pidigits	n/a	n/a	205 / 205	177 / 176
memory_string_index_long	206 / 170	216 / 172	119 / 112	119 / 97.5
text_line_logs_small	0.58 / 0.52	0.58 / 0.57	0.54 / 0.60	0.62 / 0.67
text_regex_logs_medium	38.5 / 37.3	37.9 / 36.5	25.3 / 24.0	28.4 / 22.3
text_json_transform_medium	18.0 / 13.6	20.0 / 15.8	16.7 / 14.6	15.8 / 15.0
text_line_logs_medium	27.1 / 26.8	24.0 / 23.6	13.7 / 12.3	17.5 / 16.8
text_regex_logs_small	1.44 / 1.01	1.49 / 0.99	0.92 / 0.74	2.63 / 1.02
ticket_search	41.4 / 39.5	36.9 / 34.4	14.0 / 11.2	20.2 / 19.1
perf_unpack_sequence	336 / 345	105 / 104	26.0 / 22.9	58.0 / 58.3
text_csv_aggregate_small	6.45 / 6.05	7.21 / 6.80	2.49 / 2.41	8.25 / 8.44
text_csv_cleanup_small	11.9 / 11.4	13.7 / 13.2	3.85 / 3.79	14.7 / 15.0

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
text_regex_logs_medium	22.2	22.0	22.2	127
api_report	19.9	20.0	20.0	57.4
text_regex_logs_small	20.0	19.9	19.9	58.1
capacity_planning	19.9	19.9	20.0	58.2
portfolio_risk	20.0	20.0	20.0	58.5
text_json_parse_small	19.9	20.0	19.9	57.9
expense_report	20.0	19.9	19.9	57.5
game_nbody	20.0	19.9	20.0	58.8
perf_json_dumps	20.0	20.0	20.0	60.5
stdout_lines	19.9	20.0	20.0	59.4
text_csv_cleanup_small	20.0	20.0	20.0	59.2
text_json_lines_medium	24.8	24.7	24.7	124
ticket_search	19.9	19.9	19.9	60.2
text_json_transform_medium	24.3	24.4	24.4	126
text_line_logs_medium	24.2	24.2	24.3	125
perf_json_loads	20.0	20.0	20.0	57.5
perf_unpack_sequence	20.0	20.0	20.0	62.8
text_json_transform_small	20.0	20.0	20.0	57.9
order_cleanup	20.0	20.0	20.0	57.4
game_spectral_norm	19.9	20.0	19.9	59.1
text_json_parse_medium	24.4	24.3	24.3	126
text_line_logs_small	20.0	20.0	20.0	57.8
text_csv_aggregate_small	20.0	20.0	19.9	58.6
text_json_lines_small	20.0	20.0	19.9	57.9
perf_barnes_hut	20.0	20.0	19.9	88.8
memory_string_index_long	67.5	68.0	53.9	124
memory_string_index_short	55.9	56.2	42.3	108
text_csv_cleanup_medium	49.7	49.2	33.8	147
text_csv_aggregate_medium	42.1	42.0	28.2	149
memory_string_list_long	113	113	69.8	125
memory_string_list_short	89.4	89.9	46.5	99.5
perf_float	57.5	57.3	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	20.0	64.8
game_regex_dna	n/a	failed	20.0	87.0