kalugin66/webtorrent-desktop
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perf: 60ms improvement: Replace fs-extra with mkdirp/rimraf/cp-file

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In Electron apps, the cost of large modules is very real.

fs-extra is very convenient, but removing it caused 50 fewer unique
files to be required(), resultin in 60ms faster startup!

Before: 557 unique requires (1330-1340ms)
After: 507 unique requires (1270-1280ms)
This commit is contained in:
Feross Aboukhadijeh
2016-09-30 19:51:35 -07:00
parent d4cfc32c8d
commit 02f5dbb63f
8 changed files with 66 additions and 58 deletions
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18
src/renderer/lib/state.js
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@@ -109,7 +109,8 @@ function getDefaultPlayState () {
/* If the saved state file doesn't exist yet, here's what we use instead */
function setupStateSaved (cb) {
const fs = require('fs-extra')
const cpFile = require('cp-file')
const fs = require('fs')
const parseTorrent = require('parse-torrent')
const parallel = require('run-parallel')
@@ -130,18 +131,16 @@ function setupStateSaved (cb) {
config.DEFAULT_TORRENTS.map(function (t, i) {
const infoHash = saved.torrents[i].infoHash
tasks.push(function (cb) {
fs.copy(
cpFile(
path.join(config.STATIC_PATH, t.posterFileName),
path.join(config.POSTER_PATH, infoHash + path.extname(t.posterFileName)),
cb
)
path.join(config.POSTER_PATH, infoHash + path.extname(t.posterFileName))
).then(cb).catch(cb)
})
tasks.push(function (cb) {
fs.copy(
cpFile(
path.join(config.STATIC_PATH, t.torrentFileName),
path.join(config.TORRENT_PATH, infoHash + '.torrent'),
cb
)
path.join(config.TORRENT_PATH, infoHash + '.torrent')
).then(cb).catch(cb)
})
})
@@ -151,6 +150,7 @@ function setupStateSaved (cb) {
})
function createTorrentObject (t) {
// TODO: Doing several fs.readFileSync calls during first startup is not ideal
const torrent = fs.readFileSync(path.join(config.STATIC_PATH, t.torrentFileName))
const parsedTorrent = parseTorrent(torrent)