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 2,668
bash 118,863 677
osh-native-souffle 118,863 458
osh-native 118,863 425
osh-cpython 118,863 11

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 5 3 2 3 2,698 Build.sh
osh-native-souffle 7 5 3 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 296 271 25 22 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 6 4 2 3 2,512 abuild
osh-native-souffle 8 6 2 8 2,512 abuild
osh-native 10 8 2 9 2,512 abuild
osh-cpython 397 375 22 22 2,512 abuild
dash 9 7 2 2 20,489 configure
bash 33 32 1 4 20,489 configure
osh-native-souffle 44 36 8 20 20,489 configure
osh-native 46 37 9 21 20,489 configure
osh-cpython 1,815 1,774 41 43 20,489 configure
dash 22 20 2 1 69,779 configure-coreutils
bash 81 79 2 3 69,779 configure-coreutils
osh-native-souffle 143 120 23 49 69,779 configure-coreutils
osh-native 154 124 30 50 69,779 configure-coreutils
osh-cpython 5,458 5,389 67 87 69,779 configure-coreutils
bash 5 5 1 3 2,029 configure-helper.sh
osh-native-souffle 6 5 1 8 2,029 configure-helper.sh
osh-native 7 5 2 8 2,029 configure-helper.sh
osh-cpython 278 258 20 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 5 5 0 3 1,733 functions
osh-native-souffle 6 2 4 8 1,733 functions
osh-native 7 6 1 8 1,733 functions
osh-cpython 274 250 24 21 1,733 functions
dash 5 4 1 2 9,661 ltmain.sh
bash 17 15 2 4 9,661 ltmain.sh
osh-native-souffle 19 13 6 15 9,661 ltmain.sh
osh-native 21 18 4 15 9,661 ltmain.sh
osh-cpython 868 835 34 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 2 1 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 3 1 7 1,679 t4014-format-patch.sh
osh-native 4 3 1 7 1,679 t4014-format-patch.sh
osh-cpython 107 86 21 19 1,679 t4014-format-patch.sh
dash 1 0 1 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 115 92 23 19 3,123 t9300-fast-import.sh
bash 16 15 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 13 4 12 5,160 test-cmd-util.sh
osh-native 19 13 6 12 5,160 test-cmd-util.sh
osh-cpython 836 806 30 27 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 32,963,500 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,601,670 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,800,021 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,323,803 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,640,565 20,489 configure
osh-native 276,283,509 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,429,548 69,779 configure-coreutils
osh-native 880,788,456 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,543,365 2,029 configure-helper.sh
osh-native 30,640,801 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,868,559 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,976,235 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,427,637 9,661 ltmain.sh
osh-native 113,411,178 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 10,813,685 1,679 t4014-format-patch.sh
osh-native 11,863,478 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 12,677,718 3,123 t9300-fast-import.sh
osh-native 13,925,108 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,489,038 5,160 test-cmd-util.sh
osh-native 112,739,744 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-fa1147db
dash dash-0ebcf347
osh-cpython osh-2c57cd06
osh-native osh-bc2efe1f
osh-native-souffle osh-native-souffle-28a0ad55
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-26__02-17-32.cachegrind.tsv
no-host.2025-03-26__02-17-32.times.csv