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 13.1
osh-native-souffle 118,863 11.5

(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 2,484
bash 118,863 706
osh-native-souffle 118,863 483
osh-native 118,863 443
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 1 1 1 2,698 Build.sh
bash 4 4 1 3 2,698 Build.sh
osh-native-souffle 7 6 1 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 281 253 29 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 2 3 2,512 abuild
osh-native 9 7 2 9 2,512 abuild
osh-native-souffle 9 7 2 8 2,512 abuild
osh-cpython 381 351 30 22 2,512 abuild
dash 9 8 1 2 20,489 configure
bash 32 31 1 3 20,489 configure
osh-native-souffle 40 27 13 20 20,489 configure
osh-native 44 35 9 21 20,489 configure
osh-cpython 1,831 1,800 31 43 20,489 configure
dash 25 24 1 2 69,779 configure-coreutils
bash 78 77 1 3 69,779 configure-coreutils
osh-native-souffle 135 114 21 49 69,779 configure-coreutils
osh-native 148 124 24 50 69,779 configure-coreutils
osh-cpython 5,330 5,256 73 87 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 5 1 9 2,029 configure-helper.sh
osh-cpython 269 242 27 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 2 2 3 1,733 functions
osh-native-souffle 6 4 2 8 1,733 functions
osh-native 6 5 1 8 1,733 functions
osh-cpython 261 233 28 21 1,733 functions
dash 5 4 1 2 9,661 ltmain.sh
bash 17 16 1 4 9,661 ltmain.sh
osh-native-souffle 19 13 5 15 9,661 ltmain.sh
osh-native 20 13 7 15 9,661 ltmain.sh
osh-cpython 868 839 29 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 2 2 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 0 4 7 1,679 t4014-format-patch.sh
osh-native 4 3 1 7 1,679 t4014-format-patch.sh
osh-cpython 101 75 26 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 1 3 7 3,123 t9300-fast-import.sh
osh-native 4 3 1 7 3,123 t9300-fast-import.sh
bash 5 3 2 3 3,123 t9300-fast-import.sh
osh-cpython 108 84 24 19 3,123 t9300-fast-import.sh
bash 15 13 2 3 5,160 test-cmd-util.sh
osh-native-souffle 17 12 5 12 5,160 test-cmd-util.sh
osh-native 18 16 2 12 5,160 test-cmd-util.sh
osh-cpython 773 749 24 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 32,958,155 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,595,742 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,794,497 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,317,198 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,621,822 20,489 configure
osh-native 276,264,782 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,406,802 69,779 configure-coreutils
osh-native 880,765,792 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,539,303 2,029 configure-helper.sh
osh-native 30,636,233 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,864,504 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,971,893 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,420,644 9,661 ltmain.sh
osh-native 113,404,322 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 10,811,487 1,679 t4014-format-patch.sh
osh-native 11,860,680 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 12,675,323 3,123 t9300-fast-import.sh
osh-native 13,922,689 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,464,002 5,160 test-cmd-util.sh
osh-native 112,722,956 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-04f2064e
dash dash-0ebcf347
osh-cpython osh-da2466e9
osh-native osh-42b8a4fc
osh-native-souffle osh-native-souffle-53fa84e1
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-08__21-33-52.cachegrind.tsv
no-host.2025-03-08__21-33-52.times.csv