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 11.4

(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 2,676
bash 118,863 704
osh-native-souffle 118,863 486
osh-native 118,863 457
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 4 4 8 2,698 Build.sh
osh-cpython 278 262 16 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-native 9 6 3 8 2,512 abuild
osh-cpython 375 339 36 22 2,512 abuild
dash 9 4 4 2 20,489 configure
bash 32 28 4 4 20,489 configure
osh-native-souffle 39 35 4 20 20,489 configure
osh-native 43 31 12 21 20,489 configure
osh-cpython 1,775 1,746 29 43 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 78 74 4 3 69,779 configure-coreutils
osh-native-souffle 135 119 16 51 69,779 configure-coreutils
osh-native 141 113 28 50 69,779 configure-coreutils
osh-cpython 5,244 5,175 68 87 69,779 configure-coreutils
bash 5 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 6 6 0 8 2,029 configure-helper.sh
osh-cpython 264 252 12 21 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 0 6 8 1,733 functions
osh-native 7 3 3 8 1,733 functions
osh-cpython 254 245 8 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 12 4 4 9,661 ltmain.sh
osh-native-souffle 18 7 11 15 9,661 ltmain.sh
osh-native 20 12 8 15 9,661 ltmain.sh
osh-cpython 839 807 32 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 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 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 103 75 27 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 4 0 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 108 84 24 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 12 4 11 5,160 test-cmd-util.sh
osh-native 18 18 0 12 5,160 test-cmd-util.sh
osh-cpython 768 748 20 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 32,908,128 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,362,817 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,286,868 2,512 abuild
osh-native 44,954,264 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,285,721 20,489 configure
osh-native 275,013,165 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 772,312,537 69,779 configure-coreutils
osh-native 876,674,078 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,493,177 2,029 configure-helper.sh
osh-native 30,468,435 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,805,807 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,737,991 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,251,854 9,661 ltmain.sh
osh-native 112,717,754 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 10,795,646 1,679 t4014-format-patch.sh
osh-native 11,801,801 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 12,658,618 3,123 t9300-fast-import.sh
osh-native 13,861,955 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,254,328 5,160 test-cmd-util.sh
osh-native 111,865,714 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-ebfda9ea
dash dash-0ebcf347
osh-cpython osh-996e8eab
osh-native osh-59fc8048
osh-native-souffle osh-native-souffle-1b2a3e8d
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-01-03__01-53-44.cachegrind.tsv
no-host.2025-01-03__01-53-44.times.csv