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 2,645
bash 118,863 684
osh-native-souffle 118,863 410
osh-native 118,863 367
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 2 0 1 2,698 Build.sh
bash 5 5 0 3 2,698 Build.sh
osh-native-souffle 8 8 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 298 282 16 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-native 10 10 0 8 2,512 abuild
osh-cpython 390 357 32 22 2,512 abuild
dash 9 9 0 2 20,489 configure
bash 33 29 4 4 20,489 configure
osh-native-souffle 45 45 0 21 20,489 configure
osh-native 54 49 4 21 20,489 configure
osh-cpython 1,874 1,812 60 42 20,489 configure
dash 22 22 0 1 69,779 configure-coreutils
bash 78 74 4 3 69,779 configure-coreutils
osh-native-souffle 169 149 20 51 69,779 configure-coreutils
osh-native 185 156 28 50 69,779 configure-coreutils
osh-cpython 5,486 5,440 44 86 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native-souffle 7 3 3 8 2,029 configure-helper.sh
osh-native 8 8 0 8 2,029 configure-helper.sh
osh-cpython 282 261 20 21 2,029 configure-helper.sh
dash 2 2 0 1 1,733 functions
bash 4 4 0 3 1,733 functions
osh-native-souffle 6 6 0 8 1,733 functions
osh-native 7 7 0 8 1,733 functions
osh-cpython 273 233 40 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 11 8 14 9,661 ltmain.sh
osh-native 23 15 8 15 9,661 ltmain.sh
osh-cpython 886 838 48 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
bash 4 4 0 3 1,679 t4014-format-patch.sh
osh-native 5 0 5 7 1,679 t4014-format-patch.sh
osh-cpython 115 98 16 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 5 5 0 7 3,123 t9300-fast-import.sh
bash 5 2 2 3 3,123 t9300-fast-import.sh
osh-cpython 117 86 31 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 18 7 10 12 5,160 test-cmd-util.sh
osh-native 20 20 0 12 5,160 test-cmd-util.sh
osh-cpython 803 766 36 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 32,909,315 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,364,412 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,288,681 2,512 abuild
osh-native 44,956,050 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,288,579 20,489 configure
osh-native 275,015,929 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,450,697 69,779 configure-coreutils
osh-native 876,679,075 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,494,009 2,029 configure-helper.sh
osh-native 30,469,728 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,806,731 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,739,176 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,253,340 9,661 ltmain.sh
osh-native 112,720,201 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 10,795,964 1,679 t4014-format-patch.sh
osh-native 11,802,795 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 12,659,389 3,123 t9300-fast-import.sh
osh-native 13,862,923 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,256,538 5,160 test-cmd-util.sh
osh-native 111,868,126 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-35d678a0
dash dash-0ebcf347
osh-cpython osh-99d3c173
osh-native osh-563d8a2e
osh-native-souffle osh-native-souffle-7631258c
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-09__03-22-22.cachegrind.tsv
no-host.2025-02-09__03-22-22.times.csv