Gary Court garycourt

## starbase.i
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## what-forces-layout.md

      
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                paulirish
                / what-forces-layout.md
            
            
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              May 23, 2024 14:12
            
              
                What forces layout/reflow. The comprehensive list.
              
          
    What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
Element APIs

Getting box metrics


elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent


## pso.js
// based on http://msdn.microsoft.com/en-us/magazine/hh335067.aspx
// usage example at bottom

function pso (number_of_dimensions, function_to_optimize, number_of_particles, number_of_iterations, fitness_threshold, inertia_weight, cognitive_weight, social_weight) {
	var particles           = [];
	var swarm_best_position = [];
	var swarm_best_fitness  = null;
	for (var p = 0; p < number_of_particles; p++) {
		particles.push({
			particle_position:      [],

## couchdb-ec2-install.sh
#!/bin/bash

#
# This script installs and configures couchdb on a fresh Amazon Linux AMI instance.
#
# Must be run with root privileges
# Tested with Amazon Linux AMI release 2011.02.1.1 (ami-8c1fece5)
#

export BUILD_DIR="$PWD"

## gist:911761
var tls = require('tls');
var fs = require('fs');
var Buffer = require('buffer').Buffer;
var zlib = require('zlib');
var BufferList = require('bufferlist');
var Binary = require('bufferlist/binary');
var Put = require('put');
var http = require('http');

var options =

## murmurhash2.js
function doHash(str, seed) {
  var m = 0x5bd1e995;
  var r = 24;
  var h = seed ^ str.length;
  var length = str.length;
  var currentIndex = 0;

  while (length >= 4) {
    var k = UInt32(str, currentIndex);


## gist:581868
<!DOCTYPE html>

<!-- Helpful things to keep in your <head/>
  // Brian Blakely, 360i
  // http://twitter.com/brianblakely/
-->
  <head>

    <!-- Disable automatic DNS prefetching.
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	// based on http://msdn.microsoft.com/en-us/magazine/hh335067.aspx
	// usage example at bottom

	function pso (number_of_dimensions, function_to_optimize, number_of_particles, number_of_iterations, fitness_threshold, inertia_weight, cognitive_weight, social_weight) {
	var particles = [];
	var swarm_best_position = [];
	var swarm_best_fitness = null;
	for (var p = 0; p < number_of_particles; p++) {
	particles.push({
	particle_position: [],
	#!/bin/bash

	#
	# This script installs and configures couchdb on a fresh Amazon Linux AMI instance.
	#
	# Must be run with root privileges
	# Tested with Amazon Linux AMI release 2011.02.1.1 (ami-8c1fece5)
	#

	export BUILD_DIR="$PWD"
	var tls = require('tls');
	var fs = require('fs');
	var Buffer = require('buffer').Buffer;
	var zlib = require('zlib');
	var BufferList = require('bufferlist');
	var Binary = require('bufferlist/binary');
	var Put = require('put');
	var http = require('http');

	var options =
	function doHash(str, seed) {
	var m = 0x5bd1e995;
	var r = 24;
	var h = seed ^ str.length;
	var length = str.length;
	var currentIndex = 0;

	while (length >= 4) {
	var k = UInt32(str, currentIndex);
	<!DOCTYPE html>

	<!-- Helpful things to keep in your <head/>
	// Brian Blakely, 360i
	// http://twitter.com/brianblakely/
	-->
	<head>

	<!-- Disable automatic DNS prefetching.