Bashkit benchmark run

vm-linux-x86_64 · 4 CPUs · 2026-09-02 18:17 UTC · 9bebbe7 · 96 cases × 10 iterations (warmup 2)

Bashkit vs bash, average per case

20.7×

0.539 ms vs 11.174 ms

Geometric mean speedup

29.8×

median 36.0×

Errors

0 / 0

bashkit / bash

Output match

100%

bashkit output equals bash

Speedup by category

Geometric mean of per-case speedup (bash mean ÷ bashkit mean). Hover a bar for totals.

Runners

Runner	Total (ms)	Avg / case (ms)	Errors	Output match
bashkit in-process	51.73	0.539	0	100.0%
bash subprocess	1,072.71	11.174	0	100.0%

Extremes

Largest speedup: subshell_pipeline · 96.6× (0.050 ms vs 4.823 ms)
Smallest speedup: large_nested_loops · 1.2× (3.341 ms vs 3.951 ms)

All cases

Case	bashkit mean (ms)	bash mean (ms)	Speedup	Iter	Match
startup
startup_empty	0.066 ±0.026	2.250 ±0.133	33.9×	10	✓
startup_true	0.042 ±0.002	2.188 ±0.129	52.0×	10	✓
startup_echo	0.045 ±0.004	2.339 ±0.301	52.5×	10	✓
startup_exit	0.047 ±0.010	2.212 ±0.172	47.1×	10	✓
variables
var_assign_simple	0.085 ±0.030	2.403 ±0.211	28.4×	10	✓
var_assign_many	0.117 ±0.012	2.267 ±0.174	19.3×	10	✓
var_default	0.073 ±0.033	2.194 ±0.113	30.1×	10	✓
var_length	0.052 ±0.006	2.425 ±0.208	47.1×	10	✓
var_substring	0.065 ±0.021	2.290 ±0.173	35.2×	10	✓
var_replace	0.052 ±0.003	2.298 ±0.106	44.0×	10	✓
var_nested	0.058 ±0.010	2.325 ±0.187	40.4×	10	✓
var_export	0.061 ±0.011	2.225 ±0.187	36.6×	10	✓
arithmetic
arith_basic	0.052 ±0.011	2.336 ±0.111	45.0×	10	✓
arith_complex	0.070 ±0.030	2.289 ±0.144	32.6×	10	✓
arith_variables	0.068 ±0.020	2.261 ±0.136	33.1×	10	✓
arith_increment	0.065 ±0.024	2.156 ±0.110	33.1×	10	✓
arith_modulo	0.085 ±0.019	2.107 ±0.150	24.7×	10	✓
arith_loop_sum	0.118 ±0.030	2.263 ±0.109	19.2×	10	✓
control
ctrl_if_simple	0.054 ±0.010	2.280 ±0.121	42.2×	10	✓
ctrl_if_else	0.063 ±0.013	2.233 ±0.163	35.5×	10	✓
ctrl_for_list	0.087 ±0.019	2.464 ±0.247	28.4×	10	✓
ctrl_for_range	0.106 ±0.028	2.496 ±0.327	23.7×	10	✓
ctrl_while	0.183 ±0.021	2.934 ±1.228	16.0×	10	✓
ctrl_case	0.086 ±0.009	2.257 ±0.185	26.2×	10	✓
ctrl_function	0.080 ±0.028	2.308 ±0.233	28.7×	10	✓
ctrl_function_return	0.102 ±0.020	2.940 ±0.312	28.8×	10	✓
ctrl_nested_loops	0.147 ±0.043	2.591 ±0.274	17.7×	10	✓
strings
str_concat	0.050 ±0.004	2.334 ±0.205	47.1×	10	✓
str_printf	0.051 ±0.009	2.604 ±0.302	51.1×	10	✓
str_printf_pad	0.049 ±0.007	2.521 ±0.365	51.4×	10	✓
str_echo_escape	0.063 ±0.010	2.343 ±0.169	37.1×	10	✓
str_prefix_strip	0.063 ±0.015	2.718 ±0.450	43.4×	10	✓
str_suffix_strip	0.090 ±0.015	2.529 ±0.222	28.2×	10	✓
str_uppercase	0.050 ±0.009	2.436 ±0.349	48.6×	10	✓
str_lowercase	0.049 ±0.004	2.881 ±0.327	59.0×	10	✓
arrays
arr_create	0.078 ±0.022	2.521 ±0.260	32.1×	10	✓
arr_all	0.068 ±0.014	2.500 ±0.160	37.0×	10	✓
arr_length	0.058 ±0.008	2.571 ±0.228	44.4×	10	✓
arr_iterate	0.085 ±0.022	2.304 ±0.151	27.0×	10	✓
arr_slice	0.057 ±0.004	2.575 ±0.343	45.3×	10	✓
arr_assign_index	0.057 ±0.014	2.872 ±0.281	50.1×	10	✓
pipes
pipe_simple	0.107 ±0.017	5.046 ±0.295	47.3×	10	✓
pipe_multi	0.118 ±0.032	5.383 ±0.377	45.5×	10	✓
pipe_command_subst	0.064 ±0.013	2.930 ±0.309	45.5×	10	✓
pipe_heredoc	0.070 ±0.016	4.686 ±0.381	66.9×	10	✓
pipe_herestring	0.071 ±0.022	5.205 ±0.999	73.8×	10	✓
pipe_discard	0.065 ±0.015	3.161 ±0.335	48.7×	10	✓
tools
tool_grep_simple	0.090 ±0.019	5.007 ±0.740	55.7×	10	✓
tool_grep_case	0.219 ±0.029	4.758 ±0.192	21.7×	10	✓
tool_grep_count	0.068 ±0.019	4.517 ±0.356	66.8×	10	✓
tool_grep_invert	0.064 ±0.011	4.642 ±0.369	72.5×	10	✓
tool_grep_regex	0.088 ±0.008	4.509 ±0.199	51.2×	10	✓
tool_sed_replace	0.197 ±0.049	5.138 ±0.136	26.1×	10	✓
tool_sed_global	0.182 ±0.057	4.929 ±0.405	27.1×	10	✓
tool_sed_delete	0.057 ±0.011	4.627 ±0.164	80.6×	10	✓
tool_sed_lines	0.062 ±0.019	4.843 ±0.286	78.1×	10	✓
tool_sed_backrefs	0.276 ±0.056	5.223 ±0.495	18.9×	10	✓
tool_awk_print	0.054 ±0.005	4.773 ±0.382	88.9×	10	✓
tool_awk_sum	0.067 ±0.011	4.762 ±0.297	71.3×	10	✓
tool_awk_pattern	0.132 ±0.052	4.537 ±0.266	34.4×	10	✓
tool_awk_fieldsep	0.057 ±0.006	4.893 ±0.370	86.3×	10	✓
tool_awk_nf	0.093 ±0.022	4.991 ±0.292	53.5×	10	✓
tool_awk_compute	0.080 ±0.026	4.650 ±0.337	58.1×	10	✓
tool_jq_identity	0.710 ±0.098	6.178 ±0.290	8.7×	10	✓
tool_jq_field	0.701 ±0.055	6.457 ±0.413	9.2×	10	✓
tool_jq_array	0.743 ±0.143	6.282 ±0.508	8.5×	10	✓
tool_jq_filter	0.739 ±0.089	6.528 ±0.337	8.8×	10	✓
tool_jq_map	0.694 ±0.081	7.752 ±1.149	11.2×	10	✓
complex
complex_fibonacci	5.761 ±0.381	114.7 ±5.873	19.9×	10	✓
complex_fibonacci_iter	0.121 ±0.015	2.321 ±0.167	19.1×	10	✓
complex_nested_subst	0.075 ±0.018	6.771 ±6.929	90.7×	10	✓
complex_loop_compute	0.133 ±0.027	2.399 ±0.199	18.0×	10	✓
complex_string_build	0.076 ±0.027	2.308 ±0.104	30.5×	10	✓
complex_json_transform	0.725 ±0.099	6.436 ±0.569	8.9×	10	✓
complex_pipeline_text	0.198 ±0.039	5.067 ±0.458	25.6×	10	✓
large
large_loop_1000	4.874 ±0.368	5.897 ±0.663	1.2×	10	✓
large_string_append_100	0.401 ±0.042	2.720 ±0.227	6.8×	10	✓
large_array_fill_200	1.752 ±0.184	3.144 ±0.376	1.8×	10	✓
large_nested_loops	3.341 ±0.454	3.951 ±0.410	1.2×	10	✓
large_fibonacci_12	15.6 ±1.114	325.4 ±30.4	20.9×	10	✓
large_function_calls_500	6.736 ±0.564	297.4 ±42.6	44.1×	10	✓
large_multiline_script	0.473 ±0.042	2.776 ±0.160	5.9×	10	✓
large_pipeline_chain	1.216 ±0.129	5.022 ±0.244	4.1×	10	✓
large_assoc_array	0.079 ±0.052	2.221 ±0.125	28.3×	10	✓
subshell
subshell_simple	0.049 ±0.005	3.192 ±0.133	65.8×	10	✓
subshell_isolation	0.077 ±0.019	2.820 ±0.195	36.5×	10	✓
subshell_nested	0.113 ±0.018	4.958 ±0.380	43.8×	10	✓
subshell_pipeline	0.050 ±0.002	4.823 ±0.261	96.6×	10	✓
subshell_capture_loop	0.127 ±0.029	4.853 ±0.684	38.2×	10	✓
subshell_process_subst	0.083 ±0.018	5.149 ±3.968	62.1×	10	✓
io
io_redirect_write	0.105 ±0.023	5.755 ±0.360	55.0×	10	✓
io_append	0.103 ±0.014	5.551 ±0.401	53.8×	10	✓
io_dev_null	0.088 ±0.021	2.254 ±0.223	25.5×	10	✓
io_stderr_redirect	0.083 ±0.018	2.297 ±0.188	27.7×	10	✓
io_read_lines	0.311 ±0.212	2.512 ±0.201	8.1×	10	✓
io_multiline_heredoc	0.122 ±0.014	4.584 ±0.328	37.4×	10	✓

System

Hostname: vm
OS / arch: linux / x86_64
CPUs: 4
Runners: bashkit, bash
Prewarm cases: 3
Source file: crates/bashkit-bench/results/bench-vm-linux-x86_64-1788373049.json

Generated from the bashkit-bench harness (cargo run -p bashkit-bench --release -- --save). bash is a subprocess per run, so its numbers include process spawn; bashkit runs in-process.