212 lines
8.5 KiB
V
212 lines
8.5 KiB
V
import (
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os
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flag
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scripting
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vgit
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)
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const (
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tool_version = '0.0.5'
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tool_description = ' Compares V executable size and performance,
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between 2 commits from V\'s local git history.
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When only one commit is given, it is compared to master.
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'
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)
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struct Context {
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cwd string // current working folder
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mut:
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v_repo_url string // the url of the vc repository. It can be a local folder path, which is useful to eliminate network operations...
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vc_repo_url string // the url of the vc repository. It can be a local folder path, which is useful to eliminate network operations...
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workdir string // the working folder (typically /tmp), where the tool will write
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a string // the full path to the 'after' folder inside workdir
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b string // the full path to the 'before' folder inside workdir
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vc string // the full path to the vc folder inside workdir. It is used during bootstrapping v from the C source.
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commit_before string // the git commit for the 'before' state
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commit_after string // the git commit for the 'after' state
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warmups int // how many times to execute a command before gathering stats
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verbose bool // whether to print even more stuff
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show_help bool // whether to show the usage screen
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hyperfineopts string // use for additional CLI options that will be given to the hyperfine command
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vflags string // other v options to pass to compared v commands
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}
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fn new_context() Context {
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return Context{
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cwd: os.getwd()
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commit_after: 'master'
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warmups: 4
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}
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}
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fn (c Context) compare_versions() {
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// Input is validated at this point...
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// Cleanup artifacts from previous runs of this tool:
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scripting.chdir(c.workdir)
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scripting.run('rm -rf "$c.a" "$c.b" "$c.vc" ')
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// clone the VC source *just once per comparison*, and reuse it:
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scripting.run('git clone --quiet "$c.vc_repo_url" "$c.vc" ')
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println('Comparing V performance of commit $c.commit_before (before) vs commit $c.commit_after (after) ...')
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c.prepare_v(c.b, c.commit_before)
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c.prepare_v(c.a, c.commit_after)
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scripting.chdir(c.workdir)
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if c.vflags.len > 0 {
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os.setenv('VFLAGS', c.vflags, true)
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}
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// The first is the baseline, against which all the others will be compared.
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// It is the fastest, since hello_world.v has only a single println in it,
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mut perf_files := []string
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perf_files << c.compare_v_performance('source_hello', [
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'vprod @DEBUG@ -o source.c examples/hello_world.v',
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'vprod -o source.c examples/hello_world.v',
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'v @DEBUG@ -o source.c examples/hello_world.v',
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'v -o source.c examples/hello_world.v',
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])
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perf_files << c.compare_v_performance('source_v', [
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'vprod @DEBUG@ -o source.c @COMPILER@',
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'vprod -o source.c @COMPILER@',
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'v @DEBUG@ -o source.c @COMPILER@',
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'v -o source.c @COMPILER@',
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])
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perf_files << c.compare_v_performance('binary_hello', [
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'vprod -o hello examples/hello_world.v',
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'v -o hello examples/hello_world.v',
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])
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perf_files << c.compare_v_performance('binary_v', [
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'vprod -o binary @COMPILER@',
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'v -o binary @COMPILER@',
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])
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println('All performance files:')
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for f in perf_files {
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println(' $f')
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}
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}
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fn (c &Context) prepare_v(cdir string, commit string) {
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mut cc := os.getenv('CC')
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if cc == '' {
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cc = 'cc'
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}
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mut vgit_context := vgit.VGitContext{
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cc: cc
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workdir: c.workdir
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commit_v: commit
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path_v: cdir
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path_vc: c.vc
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v_repo_url: c.v_repo_url
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vc_repo_url: c.vc_repo_url
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}
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vgit_context.compile_oldv_if_needed()
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scripting.chdir(cdir)
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println('Making a v compiler in $cdir')
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scripting.run('./v -cc ${cc} -o v $vgit_context.vvlocation')
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println('Making a vprod compiler in $cdir')
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scripting.run('./v -cc ${cc} -prod -o vprod $vgit_context.vvlocation')
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println('Stripping and compressing cv v and vprod binaries in $cdir')
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scripting.run('cp cv cv_stripped')
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scripting.run('cp v v_stripped')
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scripting.run('cp vprod vprod_stripped')
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scripting.run('strip *_stripped')
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scripting.run('cp cv_stripped cv_stripped_upxed')
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scripting.run('cp v_stripped v_stripped_upxed')
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scripting.run('cp vprod_stripped vprod_stripped_upxed')
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scripting.run('upx -qqq --lzma cv_stripped_upxed')
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scripting.run('upx -qqq --lzma v_stripped_upxed')
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scripting.run('upx -qqq --lzma vprod_stripped_upxed')
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scripting.show_sizes_of_files(['$cdir/cv', '$cdir/cv_stripped', '$cdir/cv_stripped_upxed'])
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scripting.show_sizes_of_files(['$cdir/v', '$cdir/v_stripped', '$cdir/v_stripped_upxed'])
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scripting.show_sizes_of_files(['$cdir/vprod', '$cdir/vprod_stripped', '$cdir/vprod_stripped_upxed'])
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vversion := scripting.run('$cdir/v -version')
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vcommit := scripting.run('git rev-parse --short --verify HEAD')
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println('V version is: ${vversion} , local source commit: ${vcommit}')
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if vgit_context.vvlocation == 'cmd/v' {
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println('Source lines of the compiler: ' + scripting.run('wc cmd/v/*.v vlib/compiler/*.v | tail -n -1'))
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} else if vgit_context.vvlocation == 'v.v' {
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println('Source lines of the compiler: ' + scripting.run('wc v.v vlib/compiler/*.v | tail -n -1'))
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}else{
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println('Source lines of the compiler: ' + scripting.run('wc compiler/*.v | tail -n -1'))
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}
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}
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fn (c Context) compare_v_performance(label string, commands []string) string {
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println('---------------------------------------------------------------------------------')
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println('Compare v performance when doing the following commands ($label):')
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mut source_location_a := ''
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mut source_location_b := ''
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if os.exists('$c.a/cmd/v') {
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source_location_a = 'cmd/v'
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} else {
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source_location_a = if os.exists('$c.a/v.v') { 'v.v ' } else { 'compiler/ ' }
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}
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if os.exists('$c.b/cmd/v') {
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source_location_b = 'cmd/v'
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} else {
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source_location_b = if os.exists('$c.b/v.v') { 'v.v ' } else { 'compiler/ ' }
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}
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timestamp_a,_ := vgit.line_to_timestamp_and_commit(scripting.run('cd $c.a/ ; git rev-list -n1 --timestamp HEAD'))
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timestamp_b,_ := vgit.line_to_timestamp_and_commit(scripting.run('cd $c.b/ ; git rev-list -n1 --timestamp HEAD'))
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debug_option_a := if timestamp_a > 1570877641 { '-g ' } else { '-debug ' }
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debug_option_b := if timestamp_b > 1570877641 { '-g ' } else { '-debug ' }
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mut hyperfine_commands_arguments := []string
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for cmd in commands {
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println(cmd)
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}
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for cmd in commands {
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hyperfine_commands_arguments << " \'cd ${c.b:-34s} ; ./$cmd \' ".replace_each(['@COMPILER@', source_location_b, '@DEBUG@', debug_option_b])
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}
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for cmd in commands {
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hyperfine_commands_arguments << " \'cd ${c.a:-34s} ; ./$cmd \' ".replace_each(['@COMPILER@', source_location_a, '@DEBUG@', debug_option_a])
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}
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// /////////////////////////////////////////////////////////////////////////////
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cmd_stats_file := os.real_path([c.workdir, 'v_performance_stats_${label}.json'].join(os.path_separator))
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comparison_cmd := 'hyperfine $c.hyperfineopts ' + '--export-json ${cmd_stats_file} ' + '--time-unit millisecond ' + '--style full --warmup $c.warmups ' + hyperfine_commands_arguments.join(' ')
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// /////////////////////////////////////////////////////////////////////////////
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if c.verbose {
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println(comparison_cmd)
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}
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os.system(comparison_cmd)
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println('The detailed performance comparison report was saved to: $cmd_stats_file .')
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println('')
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return cmd_stats_file
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}
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fn main() {
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scripting.used_tools_must_exist(['cp', 'rm', 'strip', 'make', 'git', 'upx', 'cc', 'wc', 'tail', 'hyperfine'])
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mut context := new_context()
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mut fp := flag.new_flag_parser(os.args)
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fp.application(os.file_name(os.executable()))
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fp.version(tool_version)
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fp.description(tool_description)
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fp.arguments_description('COMMIT_BEFORE [COMMIT_AFTER]')
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fp.skip_executable()
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fp.limit_free_args(1, 2)
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context.vflags = fp.string('vflags', 0, '', 'Additional options to pass to the v commands, for example "-cc tcc"')
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context.hyperfineopts = fp.string('hyperfine_options', 0, '',
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'Additional options passed to hyperfine.
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${flag.space}For example on linux, you may want to pass:
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${flag.space}--hyperfine_options "--prepare \'sync; echo 3 | sudo tee /proc/sys/vm/drop_caches\'"
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')
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commits := vgit.add_common_tool_options(mut context, mut fp)
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context.commit_before = commits[0]
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if commits.len > 1 {
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context.commit_after = commits[1]
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}
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context.b = vgit.normalized_workpath_for_commit(context.workdir, context.commit_before)
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context.a = vgit.normalized_workpath_for_commit(context.workdir, context.commit_after)
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context.vc = vgit.normalized_workpath_for_commit(context.workdir, 'vc')
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if !os.is_dir(context.workdir) {
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msg := 'Work folder: ' + context.workdir + ' , does not exist.'
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eprintln(msg)
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exit(2)
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}
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context.compare_versions()
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}
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