Gulp file launch and notification twice

Question

I just started using gulp for the first time, it took all the plugins that I want to use, and I wrote the first task to compile sass. This seems to work, but there are two problems: firstly, when I type gulp on the command line, it seems like 3 or 4 seconds to start, which seems slower than grunting (I started using gulp because I realized it was faster ), This is normal?

The main problem is that I have a default task that invokes the sass task. The command line output seems to suggest that both are being executed, which means that sass is compiled twice. It also prints my one gulp -notify notification twice, which seems wrong.

Here is the command line output ...

λ gulp default
[00:53:40] Using gulpfile ~\Desktop\jon\gulpfile.js
[00:53:40] Starting 'sass'...
[00:53:40] Finished 'sass' after 10 ms
[00:53:40] Starting 'default'...
[00:53:40] Finished 'default' after 7.93 μs
[00:53:41] gulp-notify: [Gulp notification] Css created
[00:53:41] gulp-notify: [Gulp notification] Css created

And here is my gulp file completely ...

var gulp = require('gulp'),
    gutil = require('gulp-util'),
    compass = require('gulp-compass'),
    rename = require('gulp-rename'),
    uglify = require('gulp-uglify'),
    watch = require('gulp-watch'),
    concat = require('gulp-concat'),
    notify = require('gulp-notify'),
    jshint = require('gulp-jshint'),
    autoprefixer = require('gulp-autoprefixer'),
    minifyCSS = require('gulp-minify-css'),
    traceur = require('gulp-traceur'),
    svgmin = require('gulp-svgmin'),
    imagemin = require('gulp-imagemin'),
    ngAnnotate = require('gulp-ng-annotate'),
    expect = require('gulp-expect-file'),
    sourcemaps = require('gulp-sourcemaps');

var paths = {
    src: "src",
    css: "stylesheets",
    img: "images",
    js:  "js"
}


// Compile Our Sass
gulp.task('sass', function() {

    gulp.src(paths.src + '/sass/*.scss')
        .pipe(sourcemaps.init())
        .pipe(compass({
            sass: 'src/sass',
            environment: 'development',
            outputStyle: 'expanded',
            debugInfo: false,
            noLineComments: true
        }))
        .pipe(autoprefixer('> 5%', 'last 2 version', 'ie 9'))
        .pipe(sourcemaps.write('./'))
        .pipe(gulp.dest(paths.css))
        .pipe(notify({ message: 'Css created' }));

});


// Dev Task
gulp.task('default', ['sass']);

- , ? , gulp ?

Answer 1

onLast gulp -notify, :

//...
.pipe(notify({message: 'Css created', onLast: true}));