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 2,721
bash 118,863 708
osh-native-souffle 118,863 457
osh-native 118,863 429
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 1 1 1 2,698 Build.sh
bash 5 3 1 3 2,698 Build.sh
osh-native-souffle 7 6 1 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 280 258 22 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native 9 4 5 8 2,512 abuild
osh-native-souffle 9 5 4 8 2,512 abuild
osh-cpython 378 361 17 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 31 1 3 20,489 configure
osh-native-souffle 41 25 16 21 20,489 configure
osh-native 44 37 7 21 20,489 configure
osh-cpython 1,824 1,780 44 43 20,489 configure
dash 22 22 0 2 69,779 configure-coreutils
bash 78 78 0 3 69,779 configure-coreutils
osh-native-souffle 147 124 23 51 69,779 configure-coreutils
osh-native 155 132 23 50 69,779 configure-coreutils
osh-cpython 5,330 5,248 82 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 271 249 22 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 260 239 22 21 1,733 functions
dash 5 3 2 2 9,661 ltmain.sh
bash 17 15 2 4 9,661 ltmain.sh
osh-native-souffle 19 13 6 15 9,661 ltmain.sh
osh-native 22 17 5 15 9,661 ltmain.sh
osh-cpython 855 828 27 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 4 2 2 7 1,679 t4014-format-patch.sh
osh-native-souffle 4 2 2 7 1,679 t4014-format-patch.sh
osh-cpython 103 81 22 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 2 2 7 3,123 t9300-fast-import.sh
osh-native 4 2 2 8 3,123 t9300-fast-import.sh
bash 5 3 1 3 3,123 t9300-fast-import.sh
osh-cpython 110 85 25 19 3,123 t9300-fast-import.sh
bash 15 14 1 3 5,160 test-cmd-util.sh
osh-native-souffle 17 11 6 12 5,160 test-cmd-util.sh
osh-native 18 15 3 12 5,160 test-cmd-util.sh
osh-cpython 773 744 28 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 32,960,751 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,592,998 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,369,008 2,512 abuild
osh-native 45,313,360 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,561,025 20,489 configure
osh-native 276,258,096 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,334,993 69,779 configure-coreutils
osh-native 880,753,950 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,932 2,029 configure-helper.sh
osh-native 30,633,827 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,858,022 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,969,913 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,402,534 9,661 ltmain.sh
osh-native 113,400,320 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 10,808,886 1,679 t4014-format-patch.sh
osh-native 11,858,153 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 12,672,795 3,123 t9300-fast-import.sh
osh-native 13,920,161 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,439,918 5,160 test-cmd-util.sh
osh-native 112,714,744 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-ff58e558
dash dash-0ebcf347
osh-cpython osh-920379cd
osh-native osh-d817b655
osh-native-souffle osh-native-souffle-f2751642
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-03-01__23-08-02.cachegrind.tsv
no-host.2025-03-01__23-08-02.times.csv