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v/cmd/tools/measure/parser_speed.v

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import os
import time
import v.ast
import v.pref
import v.parser
import v.errors
import v.scanner
fn main() {
files := os.args#[1..]
if files.len > 0 && files[0].starts_with('@') {
lst_path := files[0].all_after('@')
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listed_files := os.read_file(lst_path)!.split('\n')
process_files(listed_files)!
return
}
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process_files(files)!
}
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fn process_files(files []string) ! {
mut table := ast.new_table()
mut pref := pref.new_preferences()
pref.is_fmt = true
pref.skip_warnings = true
pref.output_mode = .silent
mut sw := time.new_stopwatch()
mut total_us := i64(0)
mut total_bytes := i64(0)
mut total_tokens := i64(0)
for f in files {
if f == '' {
continue
}
if f.ends_with('_test.v') {
continue
}
// do not measure the scanning, but only the parsing:
mut p := new_parser(f, .skip_comments, table, pref)
///
sw.restart()
_ := p.parse()
f_us := sw.elapsed().microseconds()
///
total_us += f_us
total_bytes += p.scanner.text.len
total_tokens += p.scanner.all_tokens.len
println('${f_us:10}us ${p.scanner.all_tokens.len:10} ${p.scanner.text.len:10} ${(f64(p.scanner.text.len) / p.scanner.all_tokens.len):7.3} ${p.errors.len:4} $f')
}
println('${total_us:10}us ${total_tokens:10} ${total_bytes:10} ${(f64(total_tokens) / total_bytes):7.3} | speed: ${(f64(total_bytes) / total_us):2.5f} MB/s')
}
fn new_parser(path string, comments_mode scanner.CommentsMode, table &ast.Table, pref &pref.Preferences) &parser.Parser {
mut p := &parser.Parser{
scanner: scanner.new_scanner_file(path, comments_mode, pref) or { panic(err) }
comments_mode: comments_mode
table: table
pref: pref
scope: &ast.Scope{
start_pos: 0
parent: table.global_scope
}
errors: []errors.Error{}
warnings: []errors.Warning{}
}
p.set_path(path)
return p
}