Andy Davies › Comments

"Nice research! I'm surprised the gap between Safari and UIWebView is so small as it often feels much longer when I open a site in say Tweetbot, compared to opening the same site in Safari. Other thing I've noticed is that iOS traffic to my blog is roughly split 50/50 between iOS Safari and UIWebView (in app). so the performance of UIWebView may really matter" - Andy Davies

"It's in Windows firewall Start -> Administrative Tools -> Windows Firewall with Advanced Security" - Andy Davies

"To be honest not sure - Pat Meenan is the guy to ask. I believe WPT actually uses cookies as well as user id to keep track of which tests belong to someone so you don't need to be logged in. (If you use an incongnito window aren't logged in it will keep track of the tests you do in that session but if you close and re-open the window they're gone)" - Andy Davies

"This should get you there: Control Panel -> Network and Sharing Center -> Change Adapter Settings (on lefthand side) -> right click on relevant adapter and choose properties" - Andy Davies

"As a Welsh fan, I have always wondered why have a habit of under performing against the Southern Hemisphere sides and I wonder if it's confidence. 20 odd years ago I seem to remember England had the same issue but once they'd started beating the SH sides it seemed to happen more often Let's hope Wales can travel the same route." - Andy Davies

"Think the Telegraph's Golf correspondent needs to stick to writing about golf... As a Welshman living in England of course I want Wales to win but most of all I want to see a great game of rugby. May the best team win, and oh I've got tickets :-)" - Andy Davies

""(Also, for what it’s worth, JavaScript is so rarely the bottleneck on mobile that the lack of JITting compiler has minimal impact.)" One thing I've noticed for a while is embedded pages are much slower to load in UIWebViews on my iPad e.g. in TweetBot, Feedler etc. than Safari - been meaning to dig into it to see if it's the lack of JIT or another factor affecting performance but not got that far yet. (Should really compare against iOS Chrome too!)" - Andy Davies

"I prefer evidence myself of which you offer none." - Andy Davies

"Call it b'shit all you want even the NFU say it's unclear where some closed herds get TB from - http://www.farmersguardian.com..." - Andy Davies

"TB is spread from badger to badger, cattle to cattle, badger to cattle and cattle to badger, removing badger from the equation isn't going to stop the spread of TB. Also badgers are territorial animals, kill them off and other badgers will move in the free territory." - Andy Davies

"It's funny how the farming industry claims to be the guardian of the countryside but then when the countryside gets in its way it feels it has the right to do what it wants. As it's unclear whether badgers actually pass on TB to cattle and so culling whether culling them will have the desired effect why don't we do some serious research on improving improving badgers health to see if resolves the problem as this farmer did - http://www.fwi.co.uk/articles/..." - Andy Davies

"Tightening the standards so that browser interpret things in the same way is what WHATWG is doing." - Andy Davies

"ICO is just a bitmap format without any compression, by adding their mimetype to the list of types to be gzipped by the server they will be smaller over the wire. Billy Hoffman talks a bit about it here - http://zoompf.com/2012/02/lose..." - Andy Davies

"You can specify gzip for ICO files, they compress quite well" - Andy Davies

"Cool thanks" - Andy Davies

"Yeh, I chose > in the first example for ease, in reality they should be unicode chars in the PUA range (but they're equally meaningless from a semantic viewpoint) For the final example; video, music, chat etc. is inserted and then font ligatures are used to select the relevant glyph, which is far more semantic, though what accessibility aids make of it I'm not sure." - Andy Davies

"Thanks, that works - http://jsfiddle.net/andydavies..." - Andy Davies

"Can't we have a revolution and get rid of this lot?" - Andy Davies

"Aren't there are number of factors behind dyslexia and different experiences i.e. it's not a case of letters being jumbled? (http://en.wikipedia.org/wiki/D..." - Andy Davies

"Aren't there are number of factors behind dyslexia and different experiences i.e. it's not a case of letters being jumbled? (http://en.wikipedia.org/wiki/D..." - Andy Davies

"We tend to focus on blind people when talking about accessibility but it's worth remembering that they're not the only ones with accessibility needs e.g. dyslexia, eye issues where low contrast or high-contrast colours pose problems (can't remember what they are called), motor problems etc." - Andy Davies

"GA will give you histograms, there's some limitations compared to Torbit but it's where your data is now. Before worrying too much how big is the sample size for the slow regions? Few questions/comments... Why are you sharding across three domains? I'd serve the CSS from main domain as the DNS has been resolved and some browsers will have pre-emptively opened a secodn TCP connection. Have you tried flushing after so that the browser can start requesting the resources in the head earlier? You have a vary:cookie directive on the HTML page which you may as well remove an mark the page private via cache-control Suspect you've got too much CSS/JS although it compresses over the wire, the browser still needs to compress it before parsing / executing. Use webpagetest and Page Insights Critical Path Explorer to understand what's actually happening on the page during load. Look at what could be defered until after onload e.g. UserVoice widget, and other JS Try to find a CDN that allows you to..." - Andy Davies

"Why are the MoD guarding other people's gold?" - Andy Davies

"Akamai's stats show something different... On cellular connections it appears than Android and Safari usage is pretty equal but on WiFi Safari is miles ahead http://www.akamai.com/html/io/... http://www.akamai.com/html/io/..." - Andy Davies

"From your screenshots you're using O2, who are one of the UK carriers that transform images in their proxies, but many of the other carriers don't. You can prevent O2 from re-compressing your images by using cache-control: no-transform HTTP header. The real problem in my view is that not enough people measure how long it takes a page to load in the visitors browser so they have no idea what impact large images actually have on page load times and visitor engagement. (and Safari doesn't help by not supporting the Navigation Timing API)" - Andy Davies

"HP's CFO warned they were overpaying at the time - http://www.businessinsider.com..." - Andy Davies

"I'm being cremated, preferably in a cardboard coffin and I almost certainly will not be wearing a tie. (I will come back and haunt any undertaker who attempts to put a tie on me when I'm dead)" - Andy Davies

"The sooner the tie is dead the better..." - Andy Davies

"Yeh, I only did a quick test using some sites I know that have cookies over MSS (only checked one request) Will try to find time to repeat the test for a whole page in the next week or two to see what actually happens and create some synthetic tests too." - Andy Davies

"Although cookies affect response size, isn't the bigger issue request size i.e. where the cookie makes the request larger than one TCP packet and so extra TCP roundtrips are involved?" - Andy Davies