OSH Parser Performance

We time $sh -n $file for various files under various shells, and repeat then run under cachegrind for stable metrics.

Source code: oil/benchmarks/osh-parser.sh

Raw files

Summary

Instructions Per Line (via cachegrind)

Lower numbers are generally better, but each shell recognizes a different language, and OSH uses a more thorough parsing algorithm. In thousands of "I refs".

shell label total lines thousand irefs per line
bash 118,863 15.1
dash 111,674 2.3
osh-native 118,863 13.0
osh-native-souffle 118,863 11.4

(zsh isn't measured because zsh -n unexpectedly forks.)

Average Parsing Rate, Measured on Two Machines (lines/ms)

Shell startup time is included in the elapsed time measurements, but long files are chosen to minimize its effect.

shell label total lines host no-host
dash 111,674 2,696
bash 118,863 705
osh-native-souffle 118,863 485
osh-native 118,863 458
osh-cpython 118,863 12

Per-File Measurements

Time and Memory

shell label elapsed ms user ms sys ms max rss MB num lines filename
dash 2 2 0 1 2,698 Build.sh
bash 5 5 0 3 2,698 Build.sh
osh-native 7 7 0 8 2,698 Build.sh
osh-native-souffle 8 8 0 8 2,698 Build.sh
osh-cpython 272 251 20 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 0 9 8 2,512 abuild
osh-native 9 9 0 8 2,512 abuild
osh-cpython 369 344 25 22 2,512 abuild
dash 9 8 0 2 20,489 configure
bash 32 28 4 3 20,489 configure
osh-native-souffle 40 24 16 21 20,489 configure
osh-native 43 35 8 21 20,489 configure
osh-cpython 1,795 1,762 32 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 77 73 4 3 69,779 configure-coreutils
osh-native-souffle 135 114 20 51 69,779 configure-coreutils
osh-native 141 114 27 50 69,779 configure-coreutils
osh-cpython 5,282 5,213 68 86 69,779 configure-coreutils
bash 5 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 3 3 8 2,029 configure-helper.sh
osh-native 7 0 7 8 2,029 configure-helper.sh
osh-cpython 265 237 28 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 259 243 16 21 1,733 functions
dash 4 0 4 2 9,661 ltmain.sh
bash 17 13 3 4 9,661 ltmain.sh
osh-native-souffle 18 18 0 15 9,661 ltmain.sh
osh-native 20 12 8 15 9,661 ltmain.sh
osh-cpython 861 825 36 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 0 3 3 1,679 t4014-format-patch.sh
osh-native 4 0 4 7 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-cpython 101 84 16 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 0 4 8 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 107 91 16 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 16 0 12 5,160 test-cmd-util.sh
osh-native 18 11 7 12 5,160 test-cmd-util.sh
osh-cpython 772 756 16 28 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
osh-native-souffle 32,908,132 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,362,890 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,286,872 2,512 abuild
osh-native 44,954,337 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,285,725 20,489 configure
osh-native 275,013,208 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,541 69,779 configure-coreutils
osh-native 876,674,121 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,181 2,029 configure-helper.sh
osh-native 30,468,508 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,805,811 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,738,064 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,251,840 9,661 ltmain.sh
osh-native 112,717,863 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native-souffle 10,795,644 1,679 t4014-format-patch.sh
osh-native 11,801,896 1,679 t4014-format-patch.sh
bash 25,314,918 1,679 t4014-format-patch.sh
dash 4,357,271 3,123 t9300-fast-import.sh
osh-native-souffle 12,658,622 3,123 t9300-fast-import.sh
osh-native 13,862,028 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,364 5,160 test-cmd-util.sh
osh-native 111,865,831 5,160 test-cmd-util.sh
bash 161,950,200 5,160 test-cmd-util.sh

Shell and Host Details

shell label shell id
bash bash-17d997ea
dash dash-0ebcf347
osh-cpython osh-59188c25
osh-native osh-19a9cd08
osh-native-souffle osh-native-souffle-9db9dad0
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-01-18__06-53-33.cachegrind.tsv
no-host.2025-01-18__06-53-33.times.csv