| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # A pure string-processing benchmark extracted from bash-completion.
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| 4 | #
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| 5 | # Note: most stuff moved to benchmarks/compute.
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| 6 | #
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| 7 | # Usage:
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| 8 | # benchmarks/parse-help.sh <function name>
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| 9 |
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| 10 | set -o nounset
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| 11 | set -o pipefail
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| 12 | set -o errexit
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| 13 |
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| 14 | REPO_ROOT=$(cd "$(dirname $0)/.."; pwd)
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| 15 | source build/common.sh
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| 16 |
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| 17 | readonly DATA_DIR='benchmarks/parse-help'
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| 18 | readonly EXCERPT=benchmarks/parse-help/excerpt.sh
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| 19 |
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| 20 | collect() {
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| 21 | mkdir -p $DATA_DIR
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| 22 |
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| 23 | ls --help > $DATA_DIR/ls.txt
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| 24 | ~/.local/bin/mypy --help > $DATA_DIR/mypy.txt
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| 25 |
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| 26 | wc -l $DATA_DIR/*
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| 27 | }
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| 28 |
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| 29 | collect-clang() {
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| 30 | $CLANGXX --help > $DATA_DIR/clang.txt
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| 31 | }
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| 32 |
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| 33 | shorten() {
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| 34 | egrep '^[ ]+-' $DATA_DIR/ls.txt | head -n 2 | tee $DATA_DIR/ls-short.txt
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| 35 | }
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| 36 |
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| 37 | TIMEFORMAT='%U'
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| 38 |
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| 39 | # Geez:
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| 40 | # ls mypy
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| 41 | # bash 25ms 25ms
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| 42 | # OSH 600ms 900ms There is a lot of variance here too.
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| 43 |
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| 44 | # Well I guess that is 25x slower? It's a computationally expensive thing.
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| 45 | # Oh part of this is because printf is not a builtin! Doh.
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| 46 | #
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| 47 | # TODO
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| 48 | # - count the number of printf invocations. But you have to do it recursively!
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| 49 | # - Turn this into a proper benchmark with an HTML page.
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| 50 |
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| 51 | one() {
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| 52 | local sh='bin/osh'
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| 53 | local cmd='ls-short'
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| 54 | export PS4='+[${LINENO}:${FUNCNAME[0]}] '
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| 55 | time cat $DATA_DIR/$cmd.txt | $sh -x $EXCERPT _parse_help -
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| 56 | }
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| 57 |
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| 58 | compare-one() {
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| 59 | local cmd='ls-short'
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| 60 | time cat $DATA_DIR/$cmd.txt | bin/osh $EXCERPT _parse_help -
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| 61 | echo ---
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| 62 | time cat $DATA_DIR/$cmd.txt | bash $EXCERPT _parse_help -
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| 63 | }
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| 64 |
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| 65 | "$@"
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