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 13.2

(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 2,637
bash 118,863 700
osh-native 118,863 391
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 0 5 3 2,698 Build.sh
osh-native 8 4 4 8 2,698 Build.sh
osh-cpython 273 240 32 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 6 6 0 3 2,512 abuild
osh-native 9 0 9 8 2,512 abuild
osh-cpython 364 327 37 21 2,512 abuild
dash 9 9 0 2 20,489 configure
bash 32 32 0 4 20,489 configure
osh-native 49 45 4 21 20,489 configure
osh-cpython 1,809 1,768 40 42 20,489 configure
dash 21 21 0 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native 173 136 36 50 69,779 configure-coreutils
osh-cpython 5,416 5,326 88 86 69,779 configure-coreutils
bash 6 6 0 3 2,029 configure-helper.sh
osh-native 7 7 0 8 2,029 configure-helper.sh
osh-cpython 259 238 20 20 2,029 configure-helper.sh
dash 2 1 0 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native 8 8 0 8 1,733 functions
osh-cpython 256 227 28 20 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 17 0 4 9,661 ltmain.sh
osh-native 23 13 9 15 9,661 ltmain.sh
osh-cpython 856 839 17 28 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 4 0 4 3 1,679 t4014-format-patch.sh
osh-native 5 0 5 7 1,679 t4014-format-patch.sh
osh-cpython 97 85 12 18 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native 4 4 0 7 3,123 t9300-fast-import.sh
bash 5 2 2 3 3,123 t9300-fast-import.sh
osh-cpython 104 84 20 18 3,123 t9300-fast-import.sh
bash 15 11 4 3 5,160 test-cmd-util.sh
osh-native 19 15 4 12 5,160 test-cmd-util.sh
osh-cpython 766 749 16 27 5,160 test-cmd-util.sh

Instruction Counts

shell label irefs num lines filename
dash 6,416,010 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,915,627 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native 45,799,437 2,512 abuild
dash 53,261,640 20,489 configure
osh-native 279,184,870 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native 889,825,142 69,779 configure-coreutils
osh-native 30,996,354 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
bash 28,169,399 1,733 functions
osh-native 29,268,679 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native 114,637,385 9,661 ltmain.sh
bash 172,930,991 9,661 ltmain.sh
dash 3,166,564 1,679 t4014-format-patch.sh
osh-native 11,935,238 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 14,042,001 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native 113,886,327 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-798a3b21
dash dash-308ec8e6
osh-cpython osh-9935e9a7
osh-native osh-ff56b313
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2024-08-22__05-13-49.cachegrind.tsv
no-host.2024-08-22__05-13-49.times.csv