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 2,723
bash 118,863 693
osh-native-souffle 118,863 458
osh-native 118,863 421
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 3 2 3 2,698 Build.sh
osh-native-souffle 7 2 5 8 2,698 Build.sh
osh-native 8 7 2 8 2,698 Build.sh
osh-cpython 286 263 23 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 5 1 3 2,512 abuild
osh-native-souffle 9 7 2 8 2,512 abuild
osh-native 9 6 3 9 2,512 abuild
osh-cpython 377 359 18 22 2,512 abuild
dash 8 8 0 2 20,489 configure
bash 32 30 2 4 20,489 configure
osh-native-souffle 43 33 11 20 20,489 configure
osh-native 45 37 8 21 20,489 configure
osh-cpython 1,816 1,773 43 43 20,489 configure
dash 22 22 0 2 69,779 configure-coreutils
bash 78 76 2 3 69,779 configure-coreutils
osh-native-souffle 142 122 20 51 69,779 configure-coreutils
osh-native 158 138 20 50 69,779 configure-coreutils
osh-cpython 5,330 5,251 78 86 69,779 configure-coreutils
bash 6 5 1 3 2,029 configure-helper.sh
osh-native-souffle 6 4 2 8 2,029 configure-helper.sh
osh-native 7 5 3 8 2,029 configure-helper.sh
osh-cpython 274 244 30 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 3 1 3 1,733 functions
osh-native-souffle 6 5 1 8 1,733 functions
osh-native 7 4 3 8 1,733 functions
osh-cpython 267 240 27 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 16 1 4 9,661 ltmain.sh
osh-native-souffle 20 12 8 14 9,661 ltmain.sh
osh-native 21 11 10 15 9,661 ltmain.sh
osh-cpython 876 857 19 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 3 1 3 1,679 t4014-format-patch.sh
osh-native 4 3 1 7 1,679 t4014-format-patch.sh
osh-native-souffle 4 1 3 7 1,679 t4014-format-patch.sh
osh-cpython 103 82 21 19 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 0 4 7 3,123 t9300-fast-import.sh
osh-native 4 1 3 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 109 88 21 19 3,123 t9300-fast-import.sh
bash 16 15 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 12 5 12 5,160 test-cmd-util.sh
osh-native 19 14 5 12 5,160 test-cmd-util.sh
osh-cpython 768 746 22 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 32,963,535 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,595,601 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,371,624 2,512 abuild
osh-native 45,316,150 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,564,666 20,489 configure
osh-native 276,260,119 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,761 69,779 configure-coreutils
osh-native 880,760,588 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,533,654 2,029 configure-helper.sh
osh-native 30,636,762 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,859,991 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,972,714 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,405,248 9,661 ltmain.sh
osh-native 113,403,790 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 10,811,604 1,679 t4014-format-patch.sh
osh-native 11,861,023 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 12,675,118 3,123 t9300-fast-import.sh
osh-native 13,922,605 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,443,961 5,160 test-cmd-util.sh
osh-native 112,718,320 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-3b62fdcf
dash dash-0ebcf347
osh-cpython osh-a87fcc1d
osh-native osh-508be381
osh-native-souffle osh-native-souffle-b71b23ab
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-04__02-32-48.cachegrind.tsv
no-host.2025-03-04__02-32-48.times.csv