How to lose weight (in the browser)
▻https://browserdiet.com
“And what if we got together a bunch of experts who work on large sites to create a definitive front-end performance guide? And not just one of those boring guides made for robots, what if we did something fun?”
for (i = 0; i < arr.length; i++) {
// Bad - size needs to be recalculated 1000 times
}
for (i = 0, len = arr.length; i < len; i++) {
// Good - size is calculated only 1 time and then stored
}
Et déjà traduit en français, tant qu’à faire :
▻https://browserdiet.com/fr
l’exemple choisi est inélégant et probablement inutile
▻https://stackoverflow.com/questions/5752906/is-reading-the-length-property-of-an-array-really-that-expensive-an-o
et on peut l’optimiser encore en faisantfor (var i = arr.length; i-->0) { pouet }
