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-souffle 118,863 11.6

(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 2,799
bash 118,863 709
osh-native-souffle 118,863 477
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 1 2 0 1 2,698 Build.sh
bash 5 3 2 3 2,698 Build.sh
osh-native-souffle 7 4 3 8 2,698 Build.sh
osh-cpython 263 237 26 20 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-cpython 362 338 24 21 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 31 1 3 20,489 configure
osh-native-souffle 40 32 8 20 20,489 configure
osh-cpython 1,764 1,720 44 42 20,489 configure
dash 21 21 0 1 69,779 configure-coreutils
bash 77 76 1 3 69,779 configure-coreutils
osh-native-souffle 140 122 18 45 69,779 configure-coreutils
osh-cpython 5,127 5,047 80 86 69,779 configure-coreutils
bash 5 3 2 3 2,029 configure-helper.sh
osh-native-souffle 6 4 2 8 2,029 configure-helper.sh
osh-cpython 258 238 20 20 2,029 configure-helper.sh
dash 1 1 0 1 1,733 functions
bash 4 4 1 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-cpython 249 231 17 20 1,733 functions
dash 4 3 1 2 9,661 ltmain.sh
bash 17 15 1 4 9,661 ltmain.sh
osh-native-souffle 18 10 9 14 9,661 ltmain.sh
osh-cpython 825 790 35 28 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 3 0 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 0 4 7 1,679 t4014-format-patch.sh
osh-cpython 91 69 22 18 1,679 t4014-format-patch.sh
dash 1 0 1 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 1 3 7 3,123 t9300-fast-import.sh
bash 5 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 97 77 21 18 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 11 5 11 5,160 test-cmd-util.sh
osh-cpython 758 733 25 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 33,369,364 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
dash 7,042,147 2,512 abuild
osh-native-souffle 39,405,625 2,512 abuild
bash 43,761,475 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 244,799,117 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 783,592,804 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,922,436 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 25,246,803 1,733 functions
bash 28,169,399 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 98,831,889 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 10,906,668 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 12,806,723 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 98,898,682 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-ee9e0b25
dash dash-308ec8e6
osh-cpython osh-13756407
osh-native-souffle osh-4a2ca579
host label host id
no-host no-host-e5b8d3ee

Raw Data

filename
no-host.2024-09-19__16-51-56.cachegrind.tsv
no-host.2024-09-19__16-51-56.times.csv