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: 17m 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 · 03f566bb45669a7bc5770e601a117838fe2a3f25
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@03f566bb45669a7bc5770e601a117838fe2a3f25; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
fa2ba7b018b586097efcf2ff67d29794f4ab7dd08d477d5be99c5fb5fe105398

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
1.72	1.64	13.0	24.0

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	780 / 778	554 / 554	141 / 137	19.0 / 19.2
portfolio_risk	150 / 151	109 / 108	88.4 / 85.4	12.3 / 13.5
game_spectral_norm	681 / 681	460 / 461	142 / 136	22.0 / 21.6
game_fannkuch	n/a	2210 / 2220	459 / 454	87.0 / 89.6
perf_float	383 / 345	474 / 430	94.4 / 89.6	24.0 / 20.3
expense_report	0.40 / 0.36	0.44 / 0.37	1.73 / 0.53	0.42 / 0.55
capacity_planning	77.2 / 75.2	62.7 / 62.8	18.2 / 16.1	4.26 / 4.50
order_cleanup	0.44 / 0.33	0.53 / 0.40	1.80 / 0.60	0.49 / 0.65
api_report	0.82 / 0.46	0.89 / 0.46	1.79 / 0.59	0.47 / 0.63
perf_json_loads	1.58 / 1.19	1.81 / 1.36	3.36 / 2.02	1.24 / 1.34
perf_barnes_hut	6960 / 6970	6780 / 6930	1250 / 1230	699 / 551
game_regex_dna	n/a	failed / failed	346 / 331	215 / 155
memory_string_list_short	329 / 294	321 / 282	161 / 150	83.0 / 102
stdout_lines	3.59 / 3.90	4.14 / 4.41	6.85 / 4.86	6.25 / 4.71
memory_customer_records	604 / 553	566 / 467	255 / 256	197 / 143
text_csv_aggregate_medium	576 / 554	618 / 619	135 / 130	93.8 / 74.5
memory_string_list_long	446 / 413	448 / 389	173 / 161	117 / 151
memory_string_index_short	150 / 126	149 / 125	106 / 96.7	102 / 65.5
text_json_parse_medium	14.7 / 10.7	17.1 / 13.5	15.4 / 13.2	10.4 / 10.3
perf_json_dumps	13.9 / 11.5	16.7 / 14.1	18.6 / 16.6	23.1 / 19.0
text_json_lines_medium	20.2 / 19.4	21.8 / 21.5	26.3 / 24.7	18.3 / 18.5
text_csv_cleanup_medium	1120 / 1100	1220 / 1230	259 / 254	191 / 185
game_meteor_contest	n/a	534 / 547	121 / 117	90.0 / 86.7
text_json_transform_small	0.87 / 0.54	0.93 / 0.61	0.67 / 0.66	0.52 / 0.66
text_json_lines_small	0.91 / 0.64	0.99 / 0.68	0.77 / 0.80	0.72 / 0.80
text_json_parse_small	0.75 / 0.47	0.82 / 0.49	0.48 / 0.50	0.39 / 0.56
game_pidigits	n/a	n/a	205 / 204	175 / 179
memory_string_index_long	213 / 181	215 / 182	115 / 107	115 / 99.7
text_regex_logs_medium	38.3 / 37.5	35.7 / 34.7	25.0 / 23.4	27.9 / 21.9
text_json_transform_medium	17.8 / 13.7	20.3 / 16.3	16.6 / 14.5	15.6 / 14.7
text_line_logs_small	0.56 / 0.54	0.57 / 0.56	0.55 / 0.55	0.61 / 0.67
text_line_logs_medium	26.9 / 26.3	22.4 / 21.8	13.4 / 12.3	17.2 / 16.4
text_regex_logs_small	1.41 / 0.96	1.45 / 0.99	0.91 / 0.74	2.55 / 0.98
ticket_search	41.3 / 39.2	36.9 / 36.2	13.8 / 11.3	19.9 / 19.1
perf_unpack_sequence	334 / 338	102 / 103	25.9 / 22.9	57.6 / 57.5
text_csv_aggregate_small	6.36 / 6.02	6.77 / 6.56	2.49 / 2.45	8.11 / 8.48
text_csv_cleanup_small	11.7 / 11.2	12.7 / 12.6	3.83 / 3.71	14.5 / 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_json_transform_small	19.9	19.9	20.0	57.9
text_json_transform_medium	24.3	24.2	24.4	126
game_nbody	20.0	19.9	20.0	58.8
text_csv_aggregate_small	20.0	19.9	20.0	58.6
api_report	19.9	20.0	20.0	57.4
perf_barnes_hut	19.9	20.0	20.0	88.6
stdout_lines	20.0	19.9	20.0	59.4
text_json_lines_medium	24.8	24.8	24.8	124
text_line_logs_small	20.0	19.9	20.0	57.9
game_fannkuch	n/a	20.0	20.0	58.7
capacity_planning	20.0	20.0	20.0	58.2
perf_json_dumps	20.0	20.0	20.0	60.6
game_meteor_contest	n/a	20.0	20.0	61.0
perf_json_loads	20.0	20.0	20.0	57.5
text_regex_logs_medium	22.2	22.1	22.1	127
perf_unpack_sequence	20.0	20.0	20.0	62.7
expense_report	20.0	19.9	19.9	57.4
text_line_logs_medium	24.3	24.3	24.2	125
text_json_lines_small	19.9	20.0	19.9	57.9
game_spectral_norm	20.0	20.0	20.0	59.1
ticket_search	20.0	20.0	20.0	60.1
text_regex_logs_small	20.0	20.0	20.0	58.2
text_json_parse_medium	24.3	24.3	24.2	126
text_csv_cleanup_small	19.9	20.0	19.9	59.2
order_cleanup	20.0	20.0	19.9	57.5
portfolio_risk	20.0	20.0	19.9	58.5
text_json_parse_small	20.0	20.0	19.9	57.9
memory_string_index_long	67.6	67.9	53.9	124
memory_string_index_short	56.0	56.3	42.3	108
text_csv_cleanup_medium	49.8	49.6	33.8	147
text_csv_aggregate_medium	42.0	41.8	27.9	149
memory_string_list_long	112	113	69.7	125
memory_string_list_short	89.4	90.1	46.5	99.5
perf_float	57.5	57.8	29.4	69.9
memory_customer_records	156	157	68.0	134
game_pidigits	n/a	n/a	20.0	64.9
game_regex_dna	n/a	failed	19.9	87.2