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 2,769
bash 118,863 707
osh-native-souffle 118,863 489
osh-native 118,863 438
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 0 2 1 2,698 Build.sh
bash 4 3 2 3 2,698 Build.sh
osh-native-souffle 7 5 2 8 2,698 Build.sh
osh-native 8 6 2 8 2,698 Build.sh
osh-cpython 286 262 24 22 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native-souffle 8 5 3 8 2,512 abuild
osh-native 9 8 1 9 2,512 abuild
osh-cpython 392 369 23 22 2,512 abuild
dash 8 6 2 2 20,489 configure
bash 32 32 0 4 20,489 configure
osh-native-souffle 39 32 7 20 20,489 configure
osh-native 44 35 9 21 20,489 configure
osh-cpython 1,836 1,805 32 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 78 76 2 3 69,779 configure-coreutils
osh-native-souffle 134 113 21 49 69,779 configure-coreutils
osh-native 150 123 27 50 69,779 configure-coreutils
osh-cpython 5,347 5,281 66 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 6 1 8 2,029 configure-helper.sh
osh-cpython 280 262 18 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 2 1 3 1,733 functions
osh-native-souffle 6 4 2 8 1,733 functions
osh-native 7 5 1 8 1,733 functions
osh-cpython 264 237 27 21 1,733 functions
dash 4 3 2 2 9,661 ltmain.sh
bash 17 14 3 4 9,661 ltmain.sh
osh-native-souffle 19 14 5 15 9,661 ltmain.sh
osh-native 21 13 8 15 9,661 ltmain.sh
osh-cpython 871 846 25 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 2 1 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 2 2 7 1,679 t4014-format-patch.sh
osh-native 4 2 2 7 1,679 t4014-format-patch.sh
osh-cpython 101 87 14 19 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-native 5 1 4 8 3,123 t9300-fast-import.sh
osh-cpython 109 89 20 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 12 5 12 5,160 test-cmd-util.sh
osh-native 18 14 4 12 5,160 test-cmd-util.sh
osh-cpython 790 765 26 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 32,965,619 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,603,508 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 38,802,150 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,325,653 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,644,389 20,489 configure
osh-native 276,286,626 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,435,500 69,779 configure-coreutils
osh-native 880,793,810 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,545,101 2,029 configure-helper.sh
osh-native 30,642,305 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,870,291 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,977,751 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,429,861 9,661 ltmain.sh
osh-native 113,413,520 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 10,815,007 1,679 t4014-format-patch.sh
osh-native 11,864,696 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 12,679,150 3,123 t9300-fast-import.sh
osh-native 13,926,278 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,491,725 5,160 test-cmd-util.sh
osh-native 112,742,156 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-00cb44b3
dash dash-0ebcf347
osh-cpython osh-9f429a0c
osh-native osh-33e7a51c
osh-native-souffle osh-native-souffle-376de7d5
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-28__12-34-05.cachegrind.tsv
no-host.2025-03-28__12-34-05.times.csv