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inian / gist:4305b04f991529c67b5a
Created April 15, 2015 06:03
Set up a virtual display
export DISPLAY=:10
killall -9 Xvfb
Xvfb :10 -screen 0 1024x768x24 -extension RANDR > /dev/null 2>&1 &
@inian
inian / firstpaint.js
Created July 20, 2015 10:03
First Paint
timing = !!(typeof window.performance !== "undefined" && typeof window.performance.timing !== "undefined");
if (timing && timing.msFirstPaint && window.t_pagestart) {
t_firstpaint = timing.msFirstPaint - window.t_pagestart;
} else if (window.chrome && typeof window.chrome.loadTimes === 'function') {
t_firstpaint = window.chrome.loadTimes().firstPaintTime - window.chrome.loadTimes().startLoadTime;
}
@inian
inian / swapon.sh
Created January 7, 2016 06:08
enable swap on ubuntu 14.04
sudo fallocate -l 2G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
@inian
inian / http2-compatibility-api.js
Last active November 4, 2017 12:55
Creating a zero-dependency Node.js static file server
const http2 = require('http2');
const fs = require('fs');
const options = {
key: fs.readFileSync('./selfsigned.key'),
cert: fs.readFileSync('./selfsigned.crt'),
allowHTTP1: true
}
const server = http2.createSecureServer(options, (req, res) => {
@inian
inian / cookieinject.py
Created June 9, 2015 03:41
Mitmproxy cookie Inject Script
cookieFile = ""
def start(context, argv):
global cookieFile
cookieFile = argv[1]
def request(context, flow):
f = open(cookieFile)
cookie =f.read().strip()
f.close()
if cookie != "":
@inian
inian / unregister.js
Last active June 2, 2018 08:20
Unregister Dexecure Service Worker registrations
try {
navigator.serviceWorker.getRegistrations().then(function(registrations) {
registrations.forEach(function(registration) {
if (registration.active && registration.active.scriptURL.includes("dexecure")) {
console.log('removing registration', registration);
registration.unregister();
}
})
})
} catch (e) {
@inian
inian / download.sh
Last active October 8, 2018 09:56
Download webpage using wget
wget -E -H -k -K -p -t 2 -T 30 --user-agent="Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36" -e robots=off http://example.com
@inian
inian / network-aware-sw.js
Last active June 11, 2019 18:15
Network aware asset optimization
function modifyURL(url) {
// ect can be 'slow-2g', '2g', '3g', or '4g'.
const connectionType = navigator.connection.effectiveType;
if (connectionType === "slow-2g" || connectionType === "2g") {
return url + "?opt=aggressive";
} else if (connectionType === "4g") {
return url + "?opt=mild";
} else {
return url + "?opt=default";
}
@inian
inian / async-decoding.html
Last active June 13, 2019 12:44
Image decoding
<html>
<body>
<div class="jank-detector">
Random numbers, to highlight jank:
<span class="rand"></span>
</div>
<script>
const rand = document.querySelector(".rand");
function randFrame() {
rand.textContent = Math.random();
@inian
inian / image-decode-promise.js
Last active June 13, 2019 14:42
const img = new Image();
img.src = "cat.png";
img.decode().then(() => {
// image fully decoded and can be safely rendered on the screen
const orig = document.getElementById("orig");
orig.parentElement.replaceChild(img, orig);
});