Watch task in Gulp 4 gets slower every time it runs

What were you expecting to happen? If I run gulp watch with the following gulpfile and edit test.html by adding and removing whitespace, the “styles” task should take a similar amount of time every time the watcher fires

What actually happened? Task takes longer every time it is run

Gulpfile

let gulp = require('gulp');
let rename = require('gulp-rename');

function styles() {
    return gulp.src('src/**/*.scss')
        //Issue happens with or without this rename plugin
        .pipe(rename({extname: '.test'}))
        //Issue only happens if destination directory is same as source directory
        .pipe(gulp.dest('src'));
}

gulp.task('watch', function() {
    //only happens if there is a glob here
    gulp.watch('src/**/test.html', styles);
});

What version of gulp are you using? CLI version 1.2.2 Local version 4.0.0-alpha.2

What versions of npm and node are you using? node: v7.2.0 npm: 3.10.9 OS: Windows 10

Zipped version of an app that reproduces the issue gulp-issue.zip

[robianmcd]

I tried adding {usePolling: true} to gulp.watch() and that “fixed” the issue. Not sure if that helps narrow it down.

[esDotDev]

It is the recursive ** that causes this. gulp.watch('src/*.html', styles); should fix it.