bjoernager/rust
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use BufReader for counting zero bytes

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This commit is contained in:
Yoshiki Matsuda 2022-04-29 16:54:27 +09:00
parent 34f888941e
commit 1be58056e1
2 changed files with 18 additions and 14 deletions
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28
compiler/rustc_metadata/src/rmeta/encoder.rs
View file

@ -40,7 +40,7 @@ use rustc_span::{
use rustc_target::abi::VariantIdx; use rustc_target::abi::VariantIdx;
use std::borrow::Borrow; use std::borrow::Borrow;
use std::hash::Hash; use std::hash::Hash;
use std::io::{Seek, Write}; use std::io::{Read, Seek, Write};
use std::iter; use std::iter;
use std::num::NonZeroUsize; use std::num::NonZeroUsize;
use std::path::{Path, PathBuf}; use std::path::{Path, PathBuf};
@ -734,12 +734,13 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
assert_eq!(total_bytes, computed_total_bytes); assert_eq!(total_bytes, computed_total_bytes);
if tcx.sess.meta_stats() { if tcx.sess.meta_stats() {
// let mut zero_bytes = 0; let mut zero_bytes = 0;
// for e in self.opaque.data.iter() { let file = std::io::BufReader::new(self.opaque.file());
// if *e == 0 { for e in file.bytes() {
// zero_bytes += 1; if e.unwrap() == 0 {
// } zero_bytes += 1;
// } }
}
let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64; let perc = |bytes| (bytes * 100) as f64 / total_bytes as f64;
let p = |label, bytes| { let p = |label, bytes| {
@ -747,13 +748,12 @@ impl<'a, 'tcx> EncodeContext<'a, 'tcx> {
}; };
eprintln!(""); eprintln!("");
// FIXME print zero bytes eprintln!(
//eprintln!( "{} metadata bytes, of which {} bytes ({:.1}%) are zero",
// "{} metadata bytes, of which {} bytes ({:.1}%) are zero", total_bytes,
// total_bytes, zero_bytes,
// zero_bytes, perc(zero_bytes)
// perc(zero_bytes) );
//);
p("preamble", preamble_bytes); p("preamble", preamble_bytes);
p("dep", dep_bytes); p("dep", dep_bytes);
p("lib feature", lib_feature_bytes); p("lib feature", lib_feature_bytes);

4
compiler/rustc_serialize/src/opaque.rs
View file

@ -297,6 +297,10 @@ impl FileEncoder {
} }
} }
pub fn file(&self) -> &File {
&self.file
}
#[inline] #[inline]
fn capacity(&self) -> usize { fn capacity(&self) -> usize {
self.buf.len() self.buf.len()