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 17s

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 1.2.0 · @main: Monty 1.2.0 · Python 3.15: CPython 3.15.0 · PyPy 8.0.0

Runtimes and build details

monty · monty · 1.2.0
/home/runner/work/flying-circus/flying-circus/_runtimes/monty/bin/monty
Prebuilt PyPI wheel: pydantic-monty-runtime==1.2.0; source revision and compiler flags unverified
d36ff64238568cd0fa6e152f5359512b7cd78acc000a0659fe1823ebf54b85b5

monty-main · monty · e8db9aef41aa73f4f709c15a4bc8a2d198be5ead
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@e8db9aef41aa73f4f709c15a4bc8a2d198be5ead; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
bc18eb76f2f759b1abd89a13f781f827f88a4c68dd8437441c1cfade875fa85b

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
1.92	1.88	13.9	26.4

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	654 / 655	545 / 543	141 / 137	19.5 / 19.9
portfolio_risk	153 / 152	135 / 135	88.2 / 85.4	12.9 / 13.2
game_spectral_norm	692 / 688	565 / 563	143 / 136	23.3 / 22.3
game_fannkuch	2250 / 2240	2180 / 2200	457 / 457	87.7 / 88.3
expense_report	0.42 / 0.37	0.48 / 0.39	1.80 / 0.54	0.48 / 0.55
capacity_planning	85.6 / 83.4	66.8 / 64.6	18.4 / 16.1	4.48 / 4.53
perf_float	418 / 380	515 / 449	95.9 / 90.2	24.9 / 23.1
order_cleanup	0.48 / 0.37	0.56 / 0.41	1.81 / 0.63	0.55 / 0.66
api_report	0.86 / 0.49	0.93 / 0.51	1.84 / 0.63	0.50 / 0.63
perf_json_loads	1.64 / 1.29	1.84 / 1.35	3.55 / 2.07	1.30 / 1.48
game_regex_dna	failed / failed	failed / failed	342 / 331	218 / 153
memory_string_list_short	345 / 297	309 / 258	161 / 156	86.3 / 94.0
stdout_lines	4.00 / 4.22	4.18 / 4.32	7.10 / 4.91	6.74 / 5.02
memory_customer_records	607 / 502	583 / 488	259 / 255	205 / 145
perf_barnes_hut	6640 / 6730	7220 / 7240	1260 / 1230	724 / 717
text_csv_aggregate_medium	593 / 575	634 / 615	138 / 132	99.3 / 77.0
text_json_parse_medium	15.5 / 11.1	16.7 / 12.9	15.7 / 13.6	10.7 / 10.5
text_json_lines_medium	20.1 / 19.5	21.6 / 21.2	26.9 / 25.6	18.8 / 19.7
memory_string_list_long	453 / 391	431 / 359	172 / 168	123 / 151
perf_json_dumps	14.8 / 12.2	16.4 / 13.9	19.0 / 16.9	24.2 / 19.3
memory_string_index_short	157 / 128	159 / 125	114 / 108	108 / 77.8
text_csv_cleanup_medium	1170 / 1150	1250 / 1230	263 / 257	195 / 193
game_meteor_contest	513 / 514	542 / 544	123 / 118	92.0 / 88.6
text_json_lines_small	0.95 / 0.63	1.00 / 0.71	0.79 / 0.82	0.77 / 0.79
text_json_transform_small	0.90 / 0.58	0.98 / 0.62	0.68 / 0.68	0.56 / 0.70
memory_string_index_long	213 / 182	238 / 182	125 / 118	124 / 99.5
game_pidigits	n/a	n/a	205 / 205	177 / 175
text_line_logs_small	0.55 / 0.52	0.58 / 0.60	0.57 / 0.59	0.62 / 0.67
text_json_parse_small	0.80 / 0.49	0.87 / 0.49	0.47 / 0.50	0.42 / 0.56
text_json_transform_medium	18.5 / 14.2	20.3 / 16.0	17.1 / 15.8	16.1 / 15.7
text_regex_logs_medium	37.1 / 35.6	36.1 / 34.7	25.4 / 24.0	29.0 / 22.6
text_regex_logs_small	1.44 / 0.97	1.50 / 1.01	0.94 / 0.79	2.66 / 1.04
text_line_logs_medium	23.6 / 23.2	23.9 / 23.2	13.7 / 12.4	17.6 / 17.4
ticket_search	39.2 / 37.2	38.2 / 36.2	14.3 / 11.6	21.1 / 20.5
perf_unpack_sequence	156 / 155	105 / 104	26.4 / 23.2	58.3 / 58.1
text_csv_aggregate_small	6.42 / 6.14	6.85 / 6.51	2.53 / 2.42	8.24 / 8.88
text_csv_cleanup_small	11.9 / 11.4	12.8 / 12.3	3.84 / 3.72	14.8 / 15.5

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_csv_aggregate_small	19.8	20.0	19.9	58.6
order_cleanup	20.0	19.9	20.0	57.4
stdout_lines	19.9	19.9	20.0	59.4
text_json_parse_medium	24.2	24.2	24.4	126
text_regex_logs_small	20.0	19.9	20.0	58.1
ticket_search	19.9	20.0	20.0	60.1
text_regex_logs_medium	22.1	22.2	22.2	127
portfolio_risk	19.9	20.0	20.0	58.6
text_json_transform_medium	24.3	24.2	24.3	126
game_spectral_norm	20.0	20.0	20.0	59.1
perf_json_dumps	20.0	19.9	20.0	60.4
game_nbody	20.0	19.9	20.0	58.7
perf_barnes_hut	20.0	19.9	20.0	88.8
text_line_logs_small	20.0	19.9	20.0	57.8
capacity_planning	19.9	20.0	19.9	58.1
text_json_transform_small	20.0	20.0	20.0	57.9
text_line_logs_medium	24.2	24.3	24.2	125
perf_unpack_sequence	20.0	20.0	20.0	62.9
perf_json_loads	20.0	20.0	20.0	57.5
game_fannkuch	20.0	20.0	20.0	58.7
text_json_parse_small	20.0	20.0	20.0	57.9
text_json_lines_medium	24.7	24.7	24.7	124
expense_report	19.9	20.0	19.9	57.5
text_json_lines_small	20.0	20.0	20.0	57.9
api_report	20.0	20.0	19.9	57.5
game_meteor_contest	19.9	20.0	19.9	60.9
text_csv_cleanup_small	20.0	20.0	19.9	59.2
memory_string_index_long	67.6	67.7	54.0	124
memory_string_index_short	56.3	56.4	42.3	108
text_csv_cleanup_medium	50.0	49.9	33.8	147
text_csv_aggregate_medium	42.2	42.1	28.0	149
memory_string_list_long	112	113	69.7	125
memory_string_list_short	89.4	90.0	46.5	99.5
perf_float	57.6	57.9	29.3	69.9
memory_customer_records	157	157	68.0	134
game_pidigits	n/a	n/a	20.0	64.8
game_regex_dna	failed	failed	20.0	87.2