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: 20
Parallel jobs: 1
Run duration: 29m 55s

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 · Monty main: Monty 1.1.0 · CPython 3.14.8 · 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 · c83caf523c21d71c0eb33f94b7eac7c9595c713d
/home/runner/work/flying-circus/flying-circus/_runtimes/monty-main/bin/monty
Source build: https://github.com/pydantic/monty@c83caf523c21d71c0eb33f94b7eac7c9595c713d; cargo build --locked --release -p monty-runtime --bin monty; rustc 1.99.0 (b940084d7 2026-09-28)
500dab114032d5e654db084cf9d54245f241cf4923bd467a19ea3168129edcb7

cpython · cpython · Python 3.14.8
/opt/hostedtoolcache/Python/3.14.8/x64/bin/python3.14
Source revision and compiler flags unverified
a5230d8adbd26c2185d77fb003597c4ee9c44c2369fc179122ff7c3a3a58ae59

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

Process startup · ms

Monty	Monty main	CPython	PyPy
1.94	1.87	13.7	26.0

Runtime · ms · one-shot / repeated

Bars: cpython = midpoint · blue above = faster, red below = slower · shared asinh scale (5% transition)

Workload	Monty	Monty main	CPython	PyPy
game_nbody	775 / 775	743 / 742	146 / 144	19.7 / 19.5
portfolio_risk	150 / 150	110 / 110	84.6 / 83.4	12.9 / 13.6
game_spectral_norm	688 / 696	601 / 604	136 / 134	23.6 / 22.7
game_fannkuch	n/a	n/a	489 / 485	88.1 / 87.8
expense_report	0.39 / 0.33	0.45 / 0.37	1.98 / 0.60	0.48 / 0.56
capacity_planning	77.6 / 76.1	66.8 / 64.6	22.1 / 19.7	4.75 / 4.62
order_cleanup	0.47 / 0.40	0.55 / 0.44	2.02 / 0.63	0.55 / 0.63
perf_float	386 / 346	458 / 392	96.1 / 88.0	25.4 / 22.5
api_report	0.81 / 0.48	0.91 / 0.52	2.02 / 0.63	0.53 / 0.63
perf_json_loads	1.62 / 1.17	1.80 / 1.37	3.82 / 2.19	1.32 / 1.37
perf_barnes_hut	6970 / 6980	7630 / 7640	1270 / 1270	752 / 571
game_regex_dna	n/a	n/a	318 / 310	222 / 151
stdout_lines	3.68 / 2.97	4.24 / 4.49	6.90 / 4.69	6.94 / 4.91
memory_string_list_short	331 / 284	302 / 261	155 / 149	86.7 / 127
text_csv_aggregate_medium	598 / 578	618 / 601	138 / 134	99.1 / 79.9
perf_json_dumps	14.3 / 11.8	16.2 / 13.7	21.8 / 19.4	24.8 / 21.0
text_json_parse_medium	15.4 / 11.5	17.2 / 13.2	17.4 / 15.4	10.9 / 12.6
perf_gc_traversal	n/a	n/a	22.8 / 21.5	14.6 / 1600
memory_customer_records	611 / 510	559 / 503	261 / 259	205 / 168
text_json_lines_medium	20.7 / 20.4	22.3 / 21.6	28.3 / 26.9	19.1 / 19.3
memory_string_list_long	450 / 391	431 / 385	165 / 158	120 / 165
memory_string_index_short	169 / 143	162 / 132	119 / 113	117 / 83.5
game_meteor_contest	n/a	n/a	125 / 121	93.5 / 89.6
text_json_transform_small	0.89 / 0.55	0.98 / 0.60	0.72 / 0.74	0.57 / 0.66
text_json_lines_small	0.93 / 0.63	1.00 / 0.69	0.82 / 0.84	0.76 / 0.77
text_csv_cleanup_medium	1170 / 1150	1230 / 1210	258 / 256	198 / 192
memory_string_index_long	232 / 198	232 / 191	133 / 124	138 / 96.0
text_json_parse_small	0.76 / 0.43	0.82 / 0.49	0.51 / 0.50	0.41 / 0.58
text_json_transform_medium	19.1 / 14.9	20.6 / 16.5	18.8 / 16.7	16.3 / 16.1
game_pidigits	n/a	n/a	197 / 196	179 / 179
text_regex_logs_medium	38.7 / 37.5	36.7 / 35.1	25.1 / 23.7	29.1 / 22.9
text_line_logs_small	0.59 / 0.57	0.60 / 0.59	0.55 / 0.55	0.64 / 0.68
text_line_logs_medium	27.1 / 26.5	25.7 / 26.0	14.1 / 12.4	17.7 / 17.4
text_regex_logs_small	1.45 / 0.97	1.48 / 1.01	0.94 / 0.77	2.86 / 1.04
ticket_search	42.4 / 40.6	42.9 / 41.4	14.6 / 12.4	21.2 / 20.3
perf_unpack_sequence	333 / 343	352 / 355	27.1 / 23.8	59.1 / 59.9
text_csv_aggregate_small	6.41 / 6.07	6.69 / 6.34	2.55 / 2.48	8.67 / 8.65
text_csv_cleanup_small	11.8 / 11.4	12.5 / 12.1	3.83 / 3.72	15.4 / 16.0

Peak RSS · MiB · one-shot

Bars: cpython = midpoint · blue above = less memory, red below = more memory · shared asinh scale (5% transition)

Workload	Monty	Monty main	CPython	PyPy
text_json_lines_medium	23.5	23.4	23.6	124
perf_json_dumps	19.2	19.3	19.3	60.5
perf_json_loads	19.2	19.2	19.3	57.4
text_regex_logs_medium	21.5	21.4	21.5	127
text_json_transform_small	19.4	19.3	19.4	57.8
text_json_transform_medium	23.5	23.6	23.7	126
expense_report	19.2	19.2	19.3	57.4
text_csv_cleanup_small	19.4	19.3	19.4	59.2
text_line_logs_small	19.3	19.4	19.3	57.9
perf_unpack_sequence	19.4	19.3	19.4	62.6
ticket_search	19.3	19.3	19.3	60.1
api_report	19.2	19.2	19.2	57.3
stdout_lines	19.2	19.2	19.2	59.4
game_spectral_norm	19.2	19.3	19.2	59.1
text_line_logs_medium	23.7	23.6	23.7	125
text_regex_logs_small	19.3	19.4	19.3	58.1
capacity_planning	19.2	19.2	19.2	58.2
text_csv_aggregate_small	19.4	19.4	19.4	58.6
text_json_parse_medium	23.7	23.7	23.6	126
order_cleanup	19.2	19.3	19.2	57.4
text_json_parse_small	19.4	19.3	19.3	57.8
portfolio_risk	19.3	19.3	19.2	58.6
perf_barnes_hut	19.4	19.4	19.3	88.8
game_nbody	19.3	19.3	19.2	58.7
text_json_lines_small	19.4	19.4	19.3	57.9
memory_string_index_long	67.6	67.4	53.2	124
memory_string_index_short	56.0	56.1	41.6	108
text_csv_cleanup_medium	49.9	49.5	33.1	147
text_csv_aggregate_medium	42.0	41.9	27.4	149
memory_string_list_long	113	112	69.0	125
memory_string_list_short	89.9	89.8	45.8	99.5
memory_customer_records	156	157	67.3	134
perf_float	57.7	57.2	28.4	69.9
game_fannkuch	n/a	n/a	19.3	58.7
game_meteor_contest	n/a	n/a	19.3	61.0
game_pidigits	n/a	n/a	19.2	64.9
perf_gc_traversal	n/a	n/a	19.2	66.0
game_regex_dna	n/a	n/a	19.3	87.1