foster/denoland-deno
1
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-12-18 13:22:55 -05:00
Code Issues Packages 1 Wiki Activity

perf(compile): improve FileBackedVfsFile (#27299)

Browse source
This commit is contained in:
David Sherret 2024-12-10 11:13:14 -05:00 committed by GitHub
parent 59dd5d21d4
commit 21a9e2d42b
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
1 changed files with 12 additions and 15 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
cli/standalone/virtual_fs.rs
View file

@ -1,6 +1,7 @@
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
use std::borrow::Cow;
use std::cell::RefCell;
use std::collections::HashMap;
use std::collections::HashSet;
use std::fs::File;
@ -637,10 +638,9 @@ impl VfsRoot {
}
}
#[derive(Clone)]
struct FileBackedVfsFile {
file: VirtualFile,
pos: Arc<Mutex<u64>>,
pos: RefCell<u64>,
vfs: Arc<FileBackedVfs>,
}
@ -648,7 +648,7 @@ impl FileBackedVfsFile {
fn seek(&self, pos: SeekFrom) -> FsResult<u64> {
match pos {
SeekFrom::Start(pos) => {
*self.pos.lock() = pos;
*self.pos.borrow_mut() = pos;
Ok(pos)
}
SeekFrom::End(offset) => {
@ -659,7 +659,7 @@ impl FileBackedVfsFile {
.into(),
)
} else {
let mut current_pos = self.pos.lock();
let mut current_pos = self.pos.borrow_mut();
*current_pos = if offset >= 0 {
self.file.offset.len - (offset as u64)
} else {
@ -669,7 +669,7 @@ impl FileBackedVfsFile {
}
}
SeekFrom::Current(offset) => {
let mut current_pos = self.pos.lock();
let mut current_pos = self.pos.borrow_mut();
if offset >= 0 {
*current_pos += offset as u64;
} else if -offset as u64 > *current_pos {
@ -684,7 +684,7 @@ impl FileBackedVfsFile {
fn read_to_buf(&self, buf: &mut [u8]) -> FsResult<usize> {
let read_pos = {
let mut pos = self.pos.lock();
let mut pos = self.pos.borrow_mut();
let read_pos = *pos;
// advance the position due to the read
*pos = std::cmp::min(self.file.offset.len, *pos + buf.len() as u64);
@ -698,7 +698,7 @@ impl FileBackedVfsFile {
fn read_to_end(&self) -> FsResult<Cow<'static, [u8]>> {
let read_pos = {
let mut pos = self.pos.lock();
let mut pos = self.pos.borrow_mut();
let read_pos = *pos;
// todo(dsherret): should this always set it to the end of the file?
if *pos < self.file.offset.len {
@ -734,12 +734,9 @@ impl deno_io::fs::File for FileBackedVfsFile {
self: Rc<Self>,
mut buf: BufMutView,
) -> FsResult<(usize, BufMutView)> {
let inner = (*self).clone();
tokio::task::spawn(async move {
let nread = inner.read_to_buf(&mut buf)?;
Ok((nread, buf))
})
.await?
// this is fast, no need to spawn a task
let nread = self.read_to_buf(&mut buf)?;
Ok((nread, buf))
}
fn write_sync(self: Rc<Self>, _buf: &[u8]) -> FsResult<usize> {
@ -763,8 +760,8 @@ impl deno_io::fs::File for FileBackedVfsFile {
self.read_to_end()
}
async fn read_all_async(self: Rc<Self>) -> FsResult<Cow<'static, [u8]>> {
let inner = (*self).clone();
tokio::task::spawn_blocking(move || inner.read_to_end()).await?
// this is fast, no need to spawn a task
self.read_to_end()
}
fn chmod_sync(self: Rc<Self>, _pathmode: u32) -> FsResult<()> {