99 lines
2.6 KiB
Plaintext
99 lines
2.6 KiB
Plaintext
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#!/bin/sh
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set -e
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msg() {
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printf '%s\n' "$*";
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}
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if [ $# -ne 2 ]; then
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msg "Usage: compare_v_to_c_performance COMMIT_BEFORE COMMIT_AFTER"
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exit 1
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fi
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depend_on() {
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type "$1" >/dev/null 2>&1 || {
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printf 'ERR: missing tool "%s"\n' "$1" >&2; exit 1;
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}
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}
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depend_on sh
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depend_on cp
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depend_on rm
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depend_on wc
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depend_on head
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depend_on cc
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depend_on strip
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depend_on git
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depend_on upx
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depend_on make
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depend_on hyperfine
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######################################################################
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## NB: cc should be a working, recent, sane C99 compiler
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## cc is used by the Makefile to bootstrap v (both gcc/clang work)
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##
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## If you are a C/V developer in a unix environment, you most probably
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## already have the above installed, with the possible exception of:
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## https://github.com/sharkdp/hyperfine
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##
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## Installing them is out of scope of this tool.
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######################################################################
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COMMIT_B="$1"
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COMMIT_A="$2"
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CWD="$(pwd)"
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WORKDIR="/tmp"
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B="$WORKDIR/v_at_$COMMIT_B"
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A="$WORKDIR/v_at_$COMMIT_A"
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prepare_v() {
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msg
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msg "Cloning current v source to $1 ..."
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git clone --quiet "$CWD" "$1"
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cd "$1"
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git checkout --quiet "$2"
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msg "Making v and vprod compilers in $1"
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make > /dev/null
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./v -o v compiler
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./v -prod -o vprod compiler
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cp v v_stripped
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cp vprod vprod_stripped
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strip *_stripped
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cp v_stripped v_stripped_upxed
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cp vprod_stripped vprod_stripped_upxed
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upx -qqq --lzma v_stripped_upxed
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upx -qqq --lzma vprod_stripped_upxed
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wc -c "$1/v" "$1/v_stripped" "$1/v_stripped_upxed" "$1/vprod" "$1/vprod_stripped" "$1/vprod_stripped_upxed" | head -n -1
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VVERSION="$($1/v --version)"
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GVERSION="$(git rev-parse --short --verify HEAD)"
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msg "V version is: $VVERSION , local source commit: $GVERSION"
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}
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compare_v_performance() {
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CMD="$1"
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msg "---------------------------------------------------------------------------------"
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msg "Compare '$CMD'"
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hyperfine --warmup=3 "cd '$B/' && $CMD " "cd '$A/' && $CMD "
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msg
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}
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##############################################################################
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# Cleanup artifacts from previous runs of this tool:
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cd "$WORKDIR"
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rm -rf "$A/" "$B/"
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##############################################################################
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msg "Comparing v compiler performance of commit $COMMIT_B (before) vs commit $COMMIT_A (after) ..."
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prepare_v "$B" "$COMMIT_B"
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prepare_v "$A" "$COMMIT_A"
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cd "$WORKDIR"
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compare_v_performance "./v -o x.c compiler"
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compare_v_performance "./vprod -o x.c compiler"
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compare_v_performance "./vprod -o x compiler"
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