Application benchmarks

CPU: AMD EPYC 7763 64-Core Processor · 4 logical CPUs
OS: Linux-7.0.0-1017-azure-x86_64-with-glibc2.39
Samples: 10
Parallel jobs: 1
Run duration: 19m 35s

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 3.15.1 · PyPy 8.0.1

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 · f3fb8e982560c754c5350bc30ed1d3b776bc0e2e
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@f3fb8e982560c754c5350bc30ed1d3b776bc0e2e; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.1 (58cf8f9c3 2026-10-13)
1534ca12124727d3698d61a0da060a38a60923a90af86c0a2ff0a697558103a1

python3.15 · cpython · Python 3.15.1
/opt/hostedtoolcache/Python/3.15.1/x64/bin/python3.15
Source revision and compiler flags unverified
3359482397c7a8e9b84606a9d825c3b4e2c2b89ff622d8ddb9a84e939699180a

pypy · pypy · Python 3.11.17 (ec82f20141cf, Oct 13 2026, 15:02:27) [PyPy 8.0.1 with GCC 14.2.1 20250110 (Red Hat 14.2.1-11)]
/opt/hostedtoolcache/PyPy/3.11.17/x64/bin/pypy3.11
Source revision and compiler flags unverified
7aebd6513a8f1dc8529abecf80d25b66951ddb5e9bab14b2750a7dab7947a94d

Chart baseline

Process startup · ms

Monty	@main	Python 3.15	PyPy
1.88	1.79	13.5	28.1

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	613 / 612	583 / 584	139 / 139	19.4 / 21.1
portfolio_risk	166 / 168	144 / 143	87.4 / 85.4	12.7 / 13.5
game_spectral_norm	623 / 623	590 / 589	136 / 133	23.1 / 22.2
game_fannkuch	2140 / 2130	2210 / 2190	469 / 472	88.2 / 88.1
expense_report	0.42 / 0.34	0.47 / 0.35	1.95 / 0.53	0.44 / 0.56
order_cleanup	0.46 / 0.35	0.54 / 0.41	2.01 / 0.64	0.51 / 0.65
capacity_planning	66.3 / 64.1	65.1 / 63.1	18.8 / 16.8	4.60 / 4.61
perf_float	468 / 425	499 / 440	99.3 / 92.6	25.6 / 23.6
api_report	0.90 / 0.46	0.96 / 0.48	2.01 / 0.60	0.51 / 0.64
perf_json_loads	1.78 / 1.39	1.90 / 1.34	3.78 / 2.14	1.28 / 1.35
game_regex_dna	failed / failed	failed / failed	329 / 324	225 / 161
stdout_lines	4.09 / 3.91	4.32 / 4.19	7.84 / 5.35	7.18 / 5.29
memory_customer_records	621 / 579	601 / 489	274 / 270	213 / 146
perf_barnes_hut	6670 / 6670	7290 / 7280	1260 / 1240	720 / 677
memory_string_list_short	352 / 314	331 / 274	169 / 158	94.1 / 95.9
text_csv_aggregate_medium	677 / 645	630 / 599	141 / 136	103 / 76.8
memory_string_index_short	171 / 137	161 / 124	121 / 104	121 / 66.3
text_json_parse_medium	16.3 / 11.8	17.1 / 12.3	16.0 / 13.1	10.7 / 10.2
text_json_lines_medium	20.2 / 19.8	22.4 / 21.9	27.5 / 26.9	18.6 / 19.4
memory_string_list_long	471 / 426	465 / 385	184 / 172	133 / 154
text_csv_cleanup_medium	1330 / 1310	1250 / 1210	265 / 259	203 / 192
game_meteor_contest	525 / 525	532 / 532	121 / 117	91.7 / 88.2
text_json_transform_small	0.97 / 0.55	1.01 / 0.55	0.70 / 0.66	0.54 / 0.66
text_json_parse_small	0.84 / 0.49	0.89 / 0.51	0.48 / 0.49	0.38 / 0.52
text_json_lines_small	0.98 / 0.67	1.08 / 0.71	0.83 / 0.82	0.76 / 0.76
perf_json_dumps	16.8 / 13.9	17.3 / 13.9	19.7 / 17.0	23.9 / 19.5
game_pidigits	n/a	n/a	202 / 201	179 / 182
text_line_logs_small	0.52 / 0.55	0.60 / 0.57	0.59 / 0.58	0.64 / 0.70
text_json_transform_medium	19.3 / 14.7	20.3 / 15.1	17.2 / 14.5	16.2 / 15.6
memory_string_index_long	242 / 192	229 / 186	131 / 116	136 / 112
text_regex_logs_medium	36.6 / 35.6	38.7 / 37.2	25.2 / 23.5	29.6 / 22.7
text_regex_logs_small	1.51 / 0.94	1.55 / 1.00	0.95 / 0.75	2.65 / 1.00
text_line_logs_medium	23.5 / 23.3	22.8 / 22.2	14.3 / 12.5	17.9 / 17.1
ticket_search	39.0 / 37.6	37.2 / 35.0	14.5 / 11.6	20.7 / 19.5
perf_unpack_sequence	162 / 160	101 / 100	26.4 / 22.7	58.8 / 59.3
text_csv_aggregate_small	7.30 / 6.96	6.94 / 6.41	2.66 / 2.55	8.30 / 8.55
text_csv_cleanup_small	13.6 / 13.2	12.7 / 12.2	3.98 / 3.81	14.9 / 15.7

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
portfolio_risk	19.8	19.8	19.9	58.6
capacity_planning	21.4	19.8	19.9	58.4
game_spectral_norm	19.8	19.8	19.9	59.3
text_csv_cleanup_small	20.0	20.1	20.0	59.2
text_regex_logs_medium	26.2	22.0	22.1	128
text_line_logs_small	19.9	19.8	19.8	58.2
perf_json_dumps	21.2	19.8	19.8	60.8
ticket_search	21.4	19.8	19.9	60.1
order_cleanup	19.8	19.9	19.8	57.8
text_csv_aggregate_small	20.1	19.9	19.9	58.7
text_json_parse_small	19.9	19.8	19.8	58.1
text_json_lines_small	19.8	19.9	19.8	58.1
text_line_logs_medium	24.3	24.2	24.2	125
text_json_parse_medium	29.0	24.2	24.2	126
text_json_transform_small	19.8	19.9	19.8	58.1
text_json_lines_medium	24.5	24.5	24.5	124
text_regex_logs_small	20.3	19.8	19.8	58.2
perf_barnes_hut	20.4	19.8	19.8	88.9
game_meteor_contest	20.5	19.8	19.8	61.0
expense_report	19.9	19.8	19.8	57.8
game_fannkuch	19.8	19.8	19.8	58.8
game_nbody	19.8	19.9	19.8	58.8
api_report	19.8	19.9	19.8	57.8
text_json_transform_medium	29.4	24.3	24.2	126
perf_json_loads	19.9	19.9	19.8	57.8
stdout_lines	19.8	19.9	19.8	59.4
perf_unpack_sequence	20.1	20.1	19.9	63.1
memory_string_index_long	76.3	69.3	53.8	124
memory_string_index_short	64.8	57.8	42.2	108
text_csv_cleanup_medium	58.9	51.4	33.7	147
text_csv_aggregate_medium	50.8	43.7	27.9	149
memory_string_list_long	121	114	69.6	125
memory_customer_records	166	158	68.1	134
memory_string_list_short	98.2	91.5	46.4	99.7
perf_float	66.4	59.0	29.2	70.1
game_pidigits	n/a	n/a	19.8	64.8
game_regex_dna	failed	failed	19.9	89.0