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Design Documents

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Jeff Kaufman edited this page Jan 6, 2017 · 52 revisions

Links to design documents, explaining changes to mod_pagespeed and ngx_pagespeed. Some of these have been implemented, some haven't, and they're generally only current as of the date they're marked. In general, it's best to assume that information here is obsolete, but it's useful for understanding why things were done the way they were done.

Ones marked with an * are relatively significant and generally still relevant (as of 2017-01-05).

2016-12-16 Central Controller *
2013-06-25 Below the Fold Beaconing for Split HTML
2013-05-20 Using Scanline as Intermediate Data for Image Rewriting *
2012-07-19 Cache invalidation of URL patterns
2012-03-09 Flush Subresources Early
2012-03-05 Detecting and Fixing Reflows
2012-02-29 Flush Head Early
2012-01-10 Property Cache
2012-01-?? Javascript Rewriting Ideas
2011-11-?? Inline Preview Images
2011-11-?? Javascript Embedding
2011-11-29 Prefetching Page Resources
2011-10-?? Inline CSS Imports
2011-08-?? Automatic Prerendering
2011-04-?? Asynchronous Rewriting Framework *
2011-02-?? Rewrite Result Metadata Caching
2011-01-?? Prefetch Proposal
2010-11-?? CSS Parsing
2010-11-?? Parsing and Rewriting Framework
2010-11-?? Image rewriting specification
2010-10-?? Resource Naming
2010-04-10 Resource Cache Extension