On 27 July 2017 at 14:23, Mark <m...@heyimmark.com> wrote: > > if Joe User observes that a website suddenly got notably slower with a new > version of their browser then they will blame the browser. > > This is a rather large assumption to make and, at the same time, I don’t > think it is true. When users go to a slow-loading website, I think it’s > much more likely they’ll blame the website developer. If an application > runs slow on your OS, you wouldn’t blame it on the OS vendor. Similarly, if > an application I just upgraded runs slow on my mobile device, I wouldn’t > automatically assume it's the phone manufacturer. > I'm talking about the situation were they upgrade the browser and observe that a known site runs slower afterwards than it did before. Nothing else changed. Of course they gonna blame it on the browser update, and correctly so.
> > > On Thu, Jul 27, 2017 at 7:55 AM kai zhu <kaizhu...@gmail.com> wrote: > >> On Jul 27, 2017, at 5:43 PM, Andreas Rossberg <rossb...@google.com> >> wrote: >> >> >> That is not always true. For example, ES6 has caused some notable >> performance regressions for ES5 code initially, due to extensions to the >> object model that made it even more dynamic. The new @@-hooks were >> particularly nasty and some cases required substantial amounts of work from >> implementers just to get back close to the previous baseline performance. >> Parsing also slowed down measurably. Moreover, many features tend to add >> combinatorial complexity that can make the surface of "common cases" to >> optimise for in preexisting features much larger. >> >> >> I’ve noticed chrome 59 freezing more when initially loading pages. Maybe >> its due to performance-penalty of extra parser complexity, maybe not. >> Also, the chrome-based electron-browser has gotten slower with each release >> over the past year, when I use it to test mostly es5-based browser-code. >> Can’t say about the other browser-vendors as I don’t use them as much. >> >
_______________________________________________ es-discuss mailing list es-discuss@mozilla.org https://mail.mozilla.org/listinfo/es-discuss
