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 2,750
bash 118,863 709
osh-native-souffle 118,863 473
osh-native 118,863 410
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 1 1 1 2,698 Build.sh
bash 5 3 1 3 2,698 Build.sh
osh-native-souffle 7 4 4 8 2,698 Build.sh
osh-native 8 5 3 8 2,698 Build.sh
osh-cpython 281 257 24 21 2,698 Build.sh
dash 2 1 1 1 2,512 abuild
bash 5 4 1 3 2,512 abuild
osh-native-souffle 9 6 3 8 2,512 abuild
osh-native 9 8 1 9 2,512 abuild
osh-cpython 371 347 24 22 2,512 abuild
dash 8 7 1 2 20,489 configure
bash 32 30 2 3 20,489 configure
osh-native-souffle 40 32 8 21 20,489 configure
osh-native 54 43 11 21 20,489 configure
osh-cpython 1,844 1,801 43 43 20,489 configure
dash 21 19 2 2 69,779 configure-coreutils
bash 77 77 0 3 69,779 configure-coreutils
osh-native-souffle 140 114 26 51 69,779 configure-coreutils
osh-native 159 130 29 50 69,779 configure-coreutils
osh-cpython 5,340 5,256 83 87 69,779 configure-coreutils
bash 5 4 1 3 2,029 configure-helper.sh
osh-native-souffle 6 5 1 8 2,029 configure-helper.sh
osh-native 7 5 2 8 2,029 configure-helper.sh
osh-cpython 263 249 15 21 2,029 configure-helper.sh
dash 1 1 1 1 1,733 functions
bash 4 3 1 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-native 6 6 0 8 1,733 functions
osh-cpython 259 240 19 21 1,733 functions
dash 5 3 1 2 9,661 ltmain.sh
bash 17 14 2 4 9,661 ltmain.sh
osh-native-souffle 19 14 5 15 9,661 ltmain.sh
osh-native 21 15 6 15 9,661 ltmain.sh
osh-cpython 856 822 34 29 9,661 ltmain.sh
dash 1 0 1 1 1,679 t4014-format-patch.sh
bash 3 2 2 3 1,679 t4014-format-patch.sh
osh-native-souffle 4 3 1 7 1,679 t4014-format-patch.sh
osh-native 4 1 3 7 1,679 t4014-format-patch.sh
osh-cpython 101 87 14 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native-souffle 4 3 1 7 3,123 t9300-fast-import.sh
osh-native 4 1 3 7 3,123 t9300-fast-import.sh
bash 4 4 1 3 3,123 t9300-fast-import.sh
osh-cpython 106 84 22 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native-souffle 16 12 4 12 5,160 test-cmd-util.sh
osh-native 18 15 3 12 5,160 test-cmd-util.sh
osh-cpython 781 757 24 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 32,959,839 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,591,258 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,368,074 2,512 abuild
osh-native 45,312,891 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,560,559 20,489 configure
osh-native 276,256,659 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 782,336,539 69,779 configure-coreutils
osh-native 880,754,846 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,530,138 2,029 configure-helper.sh
osh-native 30,633,074 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,857,238 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,968,995 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,401,472 9,661 ltmain.sh
osh-native 113,399,540 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 10,808,280 1,679 t4014-format-patch.sh
osh-native 11,857,709 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 12,672,119 3,123 t9300-fast-import.sh
osh-native 13,919,526 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,437,940 5,160 test-cmd-util.sh
osh-native 112,716,133 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-cd691e64
dash dash-0ebcf347
osh-cpython osh-0e73035e
osh-native osh-5c1a70ed
osh-native-souffle osh-native-souffle-c071600d
host label host id
no-host no-host-e4839999

Raw Data

filename
no-host.2025-02-27__11-37-20.cachegrind.tsv
no-host.2025-02-27__11-37-20.times.csv