lori (Life-of-request info)
'lori' can tell you how long it takes to loada page. Useful for web developers who are working on profiling, optimizing a web site.The plugin will add a status bar at the bottom right corner of Firefox and will display: * TTFB: how long it took to see the first byte from remote server (from click to first byte received). This value gives a rough estimate on when the browser can start laying out the content. * TTC: how long it took to display the page (from click to complete drawing of the page) * Page size (number of bytes used to display the page): this value includes both bytes fetched from network and bytes fetched from the browser's cache. * Number of requests: number of requests used to fetch the page's content (images, style-sheet, javascript ....). Again, this value include both network requests and cache requests.Notes: that the above stat is only updated when a page is completely displayed (the progress bar is no longer displayed). TipsSome rule-of-thumbs on how to interpret/compare these metrics: * For TTFB, shorter is better. Even for page that is large, a short TTFB (less then .5 sec) allows the browser opportunity to layout the page content as soon as possible. This can enhance the user's perception of responsiveness. * TTC, obviously shorter is better. The current general agreement is that anything above the range of 7-10 seconds are perceived by user as slow. * Page size, smaller is better. Most fast sites seem to max out around 75KB per page. Anything above 100KB tends to appear sluggish. * Number of requests, smaller is better. Nowaday, with HTTP persitent widely supported, the cost of fetching another request no longer significant. But keep an eye for extreme cases (50+). This value tends to correlates well with the page size (large number of request -> large page size).'Davide Baroncelli' reported that this plugin in breaks tab mix plus "undo close tab" functionality. This is cause by the fact that I overlay the tab UI. With Firefox 2.0, I believe this bug can be fixed since there is a now a tab-event I can listen to for tab open/close. On my TODO list.Keywords: timing, profile, optimize, stopwatch, measure page, http request
Supported 
versions: Firefox 1.0 - 2.0.0.* ALL
Notes / Comments: The current version available here is compatible with Firefox 2.0. Please ignore my previously posted comment on getting it from: http://www.le.com/~hle/lori/
Categories: Developer Tools
Addition to Status Bar:
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Install: lori (Life-of-request info)
