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: 19m 21s

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 1.4.0 · @main: Monty 1.4.0 · Python 3.15: CPython 3.15.2 · PyPy 8.0.0

Runtimes and build details

monty · monty · 1.4.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.4.0; source revision and compiler flags unverified
4479e7306fdf0c6a2a567aa139150ac47c75ab3c0138ec2c4efa010c382a87e0

monty-main · monty · 4dd8e3a102f6e0dd9b41d3bf26f91644d41b3175
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@4dd8e3a102f6e0dd9b41d3bf26f91644d41b3175; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
99359bf5ae98f25c639ebe372a9a112cab0b6f03c78f9ee2337f82679e11290e

python3.15 · cpython · Python 3.15.2
/opt/hostedtoolcache/Python/3.15.2/x64/bin/python3.15
Source revision and compiler flags unverified
2c54590c63d1ccaed1fdb78b62a413b7af41361eecbf45eb61698562e0f59e17

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
1.82	1.71	13.1	24.8

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
portfolio_risk	159 / 161	150 / 151	91.9 / 88.8	12.7 / 13.5
game_nbody	616 / 615	586 / 587	137 / 133	19.4 / 19.1
game_spectral_norm	602 / 602	599 / 598	133 / 130	22.6 / 22.0
game_fannkuch	2100 / 2090	2180 / 2160	450 / 447	86.6 / 86.3
expense_report	0.42 / 0.34	0.46 / 0.37	1.80 / 0.56	0.45 / 0.56
perf_float	470 / 428	521 / 456	97.0 / 92.3	24.9 / 21.3
capacity_planning	65.7 / 63.7	66.6 / 64.8	18.4 / 16.2	4.48 / 4.42
order_cleanup	0.48 / 0.36	0.54 / 0.42	1.81 / 0.60	0.52 / 0.63
api_report	0.84 / 0.48	0.94 / 0.49	1.82 / 0.60	0.52 / 0.63
perf_json_loads	1.65 / 1.27	1.82 / 1.38	3.48 / 2.04	1.30 / 1.37
game_regex_dna	failed / failed	failed / failed	322 / 317	217 / 155
stdout_lines	3.82 / 4.10	4.24 / 4.56	7.20 / 5.22	6.61 / 4.80
perf_barnes_hut	6690 / 6700	7280 / 7270	1230 / 1200	721 / 642
memory_string_list_short	340 / 297	327 / 271	161 / 154	86.5 / 101
memory_customer_records	606 / 509	582 / 485	267 / 261	203 / 146
text_csv_aggregate_medium	676 / 653	635 / 616	140 / 129	97.5 / 79.1
memory_string_index_short	164 / 142	160 / 130	113 / 105	109 / 67.4
text_json_parse_medium	16.1 / 12.2	17.1 / 12.8	16.4 / 14.1	10.8 / 10.9
text_json_lines_medium	20.5 / 20.6	22.6 / 21.8	27.0 / 25.8	18.9 / 18.8
memory_string_list_long	454 / 390	460 / 381	169 / 163	121 / 151
text_csv_cleanup_medium	1330 / 1310	1260 / 1230	263 / 256	196 / 189
game_meteor_contest	526 / 529	543 / 542	122 / 118	92.0 / 87.3
text_json_lines_small	0.95 / 0.63	1.02 / 0.71	0.79 / 0.81	0.75 / 0.81
text_json_transform_small	0.91 / 0.59	1.00 / 0.58	0.69 / 0.70	0.56 / 0.65
perf_json_dumps	16.6 / 14.2	17.4 / 15.4	19.3 / 17.2	23.6 / 19.7
text_json_parse_small	0.78 / 0.48	0.83 / 0.50	0.48 / 0.49	0.40 / 0.55
text_line_logs_small	0.53 / 0.50	0.57 / 0.56	0.57 / 0.59	0.64 / 0.68
game_pidigits	n/a	n/a	205 / 204	177 / 182
text_json_transform_medium	19.4 / 15.0	20.3 / 16.0	17.6 / 15.5	15.9 / 15.5
memory_string_index_long	229 / 193	236 / 188	125 / 113	122 / 102
text_regex_logs_medium	36.4 / 35.4	38.2 / 37.0	24.8 / 23.3	28.6 / 22.3
text_line_logs_medium	23.5 / 23.3	24.0 / 23.7	14.3 / 12.9	17.6 / 16.9
text_regex_logs_small	1.41 / 0.97	1.47 / 1.01	0.94 / 0.73	2.71 / 1.03
ticket_search	38.0 / 36.2	39.1 / 36.9	14.3 / 11.3	20.7 / 19.7
perf_unpack_sequence	164 / 163	105 / 104	26.0 / 21.5	58.2 / 58.7
text_csv_aggregate_small	7.21 / 6.96	6.85 / 6.49	2.55 / 2.42	8.23 / 8.51
text_csv_cleanup_small	13.5 / 13.1	12.9 / 12.4	3.81 / 3.75	14.9 / 15.6

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
text_json_transform_small	19.9	19.9	20.0	57.8
perf_barnes_hut	19.8	19.9	19.9	88.8
order_cleanup	19.8	19.8	19.9	57.4
api_report	19.8	19.8	19.9	57.4
text_json_lines_small	19.9	19.9	20.0	57.9
text_line_logs_medium	24.3	24.2	24.3	125
text_line_logs_small	19.8	19.9	19.9	57.9
stdout_lines	19.8	19.8	19.9	59.4
perf_unpack_sequence	20.0	20.0	20.0	62.9
game_fannkuch	19.9	19.8	19.9	58.7
perf_json_dumps	19.9	19.8	19.8	60.6
text_json_lines_medium	24.8	24.7	24.7	124
game_meteor_contest	19.8	19.9	19.9	60.9
game_spectral_norm	19.9	19.9	19.9	59.2
text_json_transform_medium	24.3	24.3	24.3	126
game_nbody	19.9	19.8	19.8	58.7
text_csv_cleanup_small	20.0	20.0	20.0	59.1
text_regex_logs_small	19.9	19.9	19.9	58.1
text_json_parse_medium	24.3	24.3	24.3	126
expense_report	19.8	19.8	19.8	57.5
perf_json_loads	19.9	19.9	19.9	57.4
text_regex_logs_medium	22.2	22.1	22.1	127
text_json_parse_small	19.9	19.9	19.8	57.8
portfolio_risk	19.9	19.9	19.8	58.6
text_csv_aggregate_small	20.0	20.0	19.9	58.6
capacity_planning	19.9	19.9	19.8	58.2
ticket_search	19.9	19.9	19.8	60.2
memory_string_index_long	68.0	67.8	53.7	124
memory_string_index_short	56.5	56.4	42.2	108
text_csv_cleanup_medium	50.3	49.7	33.7	147
text_csv_aggregate_medium	42.8	42.2	28.0	149
memory_string_list_long	113	113	69.6	125
memory_string_list_short	90.1	90.0	46.3	99.5
perf_float	58.0	57.7	29.4	69.9
memory_customer_records	157	157	67.8	134
game_pidigits	n/a	n/a	19.9	64.9
game_regex_dna	failed	failed	19.9	87.1