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 2,655
bash 118,863 686
osh-native-souffle 118,863 418
osh-native 118,863 359
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 3 3 3 2,698 Build.sh
osh-native-souffle 8 4 4 8 2,698 Build.sh
osh-native 9 4 4 8 2,698 Build.sh
osh-cpython 295 266 28 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 9 0 8 2,512 abuild
osh-native 10 10 0 8 2,512 abuild
osh-cpython 380 347 32 22 2,512 abuild
dash 9 4 4 2 20,489 configure
bash 32 25 7 3 20,489 configure
osh-native-souffle 46 41 4 21 20,489 configure
osh-native 56 52 4 21 20,489 configure
osh-cpython 1,825 1,788 36 43 20,489 configure
dash 22 22 0 1 69,779 configure-coreutils
bash 78 78 0 3 69,779 configure-coreutils
osh-native-souffle 161 136 24 51 69,779 configure-coreutils
osh-native 190 170 20 50 69,779 configure-coreutils
osh-cpython 5,438 5,365 72 86 69,779 configure-coreutils
bash 6 3 3 3 2,029 configure-helper.sh
osh-native-souffle 7 3 3 8 2,029 configure-helper.sh
osh-native 8 4 4 8 2,029 configure-helper.sh
osh-cpython 283 271 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 6 0 8 1,733 functions
osh-native 7 7 0 8 1,733 functions
osh-cpython 272 259 12 21 1,733 functions
dash 4 0 4 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native-souffle 21 21 0 15 9,661 ltmain.sh
osh-native 23 15 8 15 9,661 ltmain.sh
osh-cpython 867 838 28 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 4 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 0 4 7 1,679 t4014-format-patch.sh
osh-native 5 5 0 7 1,679 t4014-format-patch.sh
osh-cpython 111 102 9 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 0 5 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 116 102 13 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 18 15 4 11 5,160 test-cmd-util.sh
osh-native 19 19 0 12 5,160 test-cmd-util.sh
osh-cpython 789 744 44 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 32,897,646 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,368,364 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,294,289 2,512 abuild
osh-native 44,959,882 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,300,420 20,489 configure
osh-native 275,026,250 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,464,026 69,779 configure-coreutils
osh-native 876,688,441 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,496,962 2,029 configure-helper.sh
osh-native 30,472,544 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,809,684 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,741,976 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,258,479 9,661 ltmain.sh
osh-native 112,725,550 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 10,797,819 1,679 t4014-format-patch.sh
osh-native 11,804,486 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 12,661,251 3,123 t9300-fast-import.sh
osh-native 13,864,678 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,262,438 5,160 test-cmd-util.sh
osh-native 111,883,088 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-8c6c9222
dash dash-0ebcf347
osh-cpython osh-4c6a435c
osh-native osh-549b8aaa
osh-native-souffle osh-native-souffle-8363a285
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-18__01-18-28.cachegrind.tsv
no-host.2025-02-18__01-18-28.times.csv