gulp is sometimes slow to start #632
Comments
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gulpfile? node version? OS? |
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First guess: too many dependencies being loaded on start is taxing the fs? Solution: lazily load plugins and deps in each task instead of at the top of the file |
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Updated ;) What do you think so? |
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It's certainly the loading of tasks/dependencies which is slow, but how to do it better? my code isn't correct there? it doesn't lazyload 'em? |
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To lazyload, this var gulp = require('gulp')
var es = require('event-stream')
var gutil = require('gulp-util')
var imagemin = require('gulp-imagemin')
var svgmin = require('gulp-svgmin')
module.exports = function() {
var bitmap = gulp.src('src/frontend/images/**/{*.png,*.gif,*.jpg,*.jpeg}')
.pipe( gutil.env.dist ? imagemin( { optimizationLevel: 5 } ) : gutil.noop() )
var vector = gulp.src('src/frontend/images/**/*.svg')
.pipe( gutil.env.dist ? svgmin() : gutil.noop() )
return es.merge( bitmap, vector).pipe( gulp.dest('web/assets/images') )
}would become this module.exports = function() {
var gulp = require('gulp')
var es = require('event-stream')
var gutil = require('gulp-util')
var imagemin = require('gulp-imagemin')
var svgmin = require('gulp-svgmin')
var bitmap = gulp.src('src/frontend/images/**/{*.png,*.gif,*.jpg,*.jpeg}')
.pipe( gutil.env.dist ? imagemin( { optimizationLevel: 5 } ) : gutil.noop() )
var vector = gulp.src('src/frontend/images/**/*.svg')
.pipe( gutil.env.dist ? svgmin() : gutil.noop() )
return es.merge( bitmap, vector).pipe( gulp.dest('web/assets/images') )
} |
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Also I would recommend using gulp-if instead of the |
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You could also lazy require the gulp plugins so they're only required on first use. |
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Thank you, I'll try all your advice. ;) |
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After some tests, I must admit on a whole compilation, it changes not really (but it was premeditated). Instead of taking lots of time to start, gulp takes some times on each task. |
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@kud you can use time-require to figure out which require is the slowest. But the require mechanism is expensive, especially on non-SSD harddrives. |
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grazie mille ;) |
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Interesting: |
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Lol, there's something really wrong with your computer. It seems like everything takes 60x the time it should.
On my computer:
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My computer needs more ram and a SSD. :)
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Outside the scope of gulp, your computer is loading modules really slow. Closing. |
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I think I've found the problem. As loading gulp modules ask lots of require, it does some I/O, and as I'm swapping at the same time, the hard disk hurts a lot. :) |
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On my machine with lots of softwares (sketch, firefox as frontend dev, VMs, etc), I don't have enough ram for gulp and its start is in this case really slow.
Once it was started, all is ok, the compilation is really fast and the next time I start gulp, it'll be fast too.
Note : This issue is for the moment a memo, I'll be back with more information. ;)
An indication of a compilation without troubles:
Packages:
{ "gulp": "3.8.6", "gulp-concat": "2.2.0", "gulp-consolidate": "0.1.2", "gulp-declare": "0.2.0", "gulp-define-module": "0.1.1", "gulp-filter": "0.5.0", "gulp-handlebars": "2.1.0", "gulp-iconfont": "0.1.0", "gulp-imagemin": "0.6.1", "gulp-jshint": "1.6.3", "gulp-livereload": "2.1.0", "gulp-minify-css": "0.3.5", "gulp-myth": "0.3.1", "gulp-plumber": "0.6.3", "gulp-rename": "1.2.0", "gulp-replace": "0.3.0", "gulp-rev": "0.4.2", "gulp-svg-symbols": "0.1.2", "gulp-svgmin": "0.4.6", "gulp-uglify": "0.3.1", "gulp-util": "2.2.17" }gulpfile.js:
node :
v0.10.31macosx :
10.9.4An example of task:
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