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 11.5

(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 2,653
bash 118,863 702
osh-native-souffle 118,863 483
osh-native 118,863 447
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-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 277 253 24 22 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native-souffle 9 4 4 8 2,512 abuild
osh-native 11 10 0 8 2,512 abuild
osh-cpython 372 364 8 22 2,512 abuild
dash 9 6 3 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 40 40 0 21 20,489 configure
osh-native 44 32 12 21 20,489 configure
osh-cpython 1,789 1,764 24 43 20,489 configure
dash 21 18 4 2 69,779 configure-coreutils
bash 77 73 4 3 69,779 configure-coreutils
osh-native-souffle 135 104 32 51 69,779 configure-coreutils
osh-native 144 128 16 50 69,779 configure-coreutils
osh-cpython 5,226 5,157 68 87 69,779 configure-coreutils
bash 6 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 273 245 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 0 6 8 1,733 functions
osh-native 6 3 3 8 1,733 functions
osh-cpython 259 231 28 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 19 19 0 15 9,661 ltmain.sh
osh-native 21 4 16 15 9,661 ltmain.sh
osh-cpython 841 812 28 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 4 0 3 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-native 4 4 0 7 1,679 t4014-format-patch.sh
osh-cpython 102 77 24 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 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 106 83 23 19 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native-souffle 16 12 4 12 5,160 test-cmd-util.sh
osh-native 18 18 0 12 5,160 test-cmd-util.sh
osh-cpython 762 737 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 32,897,636 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,368,480 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,294,279 2,512 abuild
osh-native 44,959,998 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,300,410 20,489 configure
osh-native 275,026,366 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,464,016 69,779 configure-coreutils
osh-native 876,688,586 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,496,952 2,029 configure-helper.sh
osh-native 30,472,690 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,809,674 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,742,122 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,258,277 9,661 ltmain.sh
osh-native 112,725,521 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 10,797,745 1,679 t4014-format-patch.sh
osh-native 11,804,584 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 12,661,241 3,123 t9300-fast-import.sh
osh-native 13,864,794 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,262,331 5,160 test-cmd-util.sh
osh-native 111,883,123 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-5a999962
dash dash-0ebcf347
osh-cpython osh-e1533694
osh-native osh-d2456735
osh-native-souffle osh-native-souffle-e3b40387
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-16__02-06-52.cachegrind.tsv
no-host.2025-02-16__02-06-52.times.csv