网页性能优化，通常要处理图片，尤其图片量大的时候，更需要工具来批量处理，这里使用gulp，做个简单总结
image-resize压缩尺寸
var gulp = require('gulp');
var imageResize = require('gulp-image-resize');
gulp.task('resize', function() {
return gulp.src('./images/**/*')
.pipe(imageResize({
width: 400
}))
.pipe(gulp.dest('dist/resize'));
});
gulp-imagemin品质压缩
var gulp = require('gulp');
var imagemin = require('gulp-imagemin');
var pngquant = require('imagemin-pngquant');
gulp.task('min', function() {
return gulp.src('./images/**/*')
.pipe(imagemin({
progressive: true,
use: [pngquant({
quality: '65-80'
})]
}))
.pipe(gulp.dest('dist/min'));
})