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 2,702
bash 118,863 709
osh-native-souffle 118,863 489
osh-native 118,863 460
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-souffle 7 7 0 8 2,698 Build.sh
osh-native 8 8 0 8 2,698 Build.sh
osh-cpython 276 248 28 21 2,698 Build.sh
dash 2 2 0 1 2,512 abuild
bash 5 5 0 3 2,512 abuild
osh-native 9 4 4 9 2,512 abuild
osh-native-souffle 9 9 0 8 2,512 abuild
osh-cpython 368 348 20 22 2,512 abuild
dash 8 4 4 2 20,489 configure
bash 32 32 0 3 20,489 configure
osh-native-souffle 39 24 16 21 20,489 configure
osh-native 43 39 4 21 20,489 configure
osh-cpython 1,788 1,751 36 43 20,489 configure
dash 21 18 4 1 69,779 configure-coreutils
bash 77 69 8 3 69,779 configure-coreutils
osh-native-souffle 131 111 20 51 69,779 configure-coreutils
osh-native 141 121 20 50 69,779 configure-coreutils
osh-cpython 5,205 5,120 84 87 69,779 configure-coreutils
bash 5 5 0 3 2,029 configure-helper.sh
osh-native-souffle 6 6 0 8 2,029 configure-helper.sh
osh-native 6 6 0 8 2,029 configure-helper.sh
osh-cpython 270 238 32 21 2,029 configure-helper.sh
dash 1 0 1 1 1,733 functions
bash 4 0 4 3 1,733 functions
osh-native-souffle 6 3 3 8 1,733 functions
osh-native 6 3 3 8 1,733 functions
osh-cpython 256 236 20 21 1,733 functions
dash 4 4 0 2 9,661 ltmain.sh
bash 17 12 4 4 9,661 ltmain.sh
osh-native-souffle 18 9 9 14 9,661 ltmain.sh
osh-native 20 16 4 15 9,661 ltmain.sh
osh-cpython 857 821 36 29 9,661 ltmain.sh
dash 1 1 0 1 1,679 t4014-format-patch.sh
bash 3 0 3 3 1,679 t4014-format-patch.sh
osh-native 4 4 0 7 1,679 t4014-format-patch.sh
osh-native-souffle 4 4 0 7 1,679 t4014-format-patch.sh
osh-cpython 100 72 28 19 1,679 t4014-format-patch.sh
dash 1 1 0 1 3,123 t9300-fast-import.sh
osh-native 4 4 0 7 3,123 t9300-fast-import.sh
osh-native-souffle 4 4 0 7 3,123 t9300-fast-import.sh
bash 5 5 0 3 3,123 t9300-fast-import.sh
osh-cpython 106 85 20 19 3,123 t9300-fast-import.sh
bash 15 15 0 3 5,160 test-cmd-util.sh
osh-native 18 17 0 12 5,160 test-cmd-util.sh
osh-native-souffle 18 18 0 11 5,160 test-cmd-util.sh
osh-cpython 754 726 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 32,897,606 2,698 Build.sh
bash 35,958,882 2,698 Build.sh
osh-native 37,368,412 2,698 Build.sh
dash 7,042,147 2,512 abuild
bash 43,761,475 2,512 abuild
osh-native-souffle 44,294,248 2,512 abuild
osh-native 44,959,930 2,512 abuild
dash 53,261,640 20,489 configure
osh-native-souffle 241,300,350 20,489 configure
osh-native 275,026,298 20,489 configure
bash 349,702,388 20,489 configure
dash 151,770,612 69,779 configure-coreutils
osh-native-souffle 781,463,956 69,779 configure-coreutils
osh-native 876,688,519 69,779 configure-coreutils
bash 886,197,417 69,779 configure-coreutils
osh-native-souffle 26,495,823 2,029 configure-helper.sh
osh-native 30,472,622 2,029 configure-helper.sh
bash 47,119,375 2,029 configure-helper.sh
dash 4,652,224 1,733 functions
osh-native-souffle 24,809,644 1,733 functions
bash 28,169,399 1,733 functions
osh-native 28,742,054 1,733 functions
dash 23,597,230 9,661 ltmain.sh
osh-native-souffle 97,258,247 9,661 ltmain.sh
osh-native 112,725,477 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 10,797,685 1,679 t4014-format-patch.sh
osh-native 11,804,524 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 12,661,211 3,123 t9300-fast-import.sh
osh-native 13,864,726 3,123 t9300-fast-import.sh
bash 41,138,083 3,123 t9300-fast-import.sh
osh-native-souffle 97,262,301 5,160 test-cmd-util.sh
osh-native 111,883,072 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-4ee7ae1a
dash dash-0ebcf347
osh-cpython osh-5f5208b1
osh-native osh-a3f8513a
osh-native-souffle osh-native-souffle-157e9336
host label host id
no-host no-host-556df3ee

Raw Data

filename
no-host.2025-02-17__11-20-09.cachegrind.tsv
no-host.2025-02-17__11-20-09.times.csv