Webdev:Meetings:2008-12-23: Difference between revisions

Webdev:Meetings:2008-12-23 (view source)

1,089 bytes added , 23 December 2008

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 ** Community Store push last week
 ** Rewriting Graph server javascript code
+* lorchard
+** LizardFeeder launch attempt, still pending
+** AMO Bandwagon feed working, lessons learned:
+*** Problem:
+**** Models yield lots of deeply nested arrays, even with lots of unbinding
+**** Sanitizing is heavily recursive with deeply nested arrays, is slow, and appears to tickle PHP-level memory leaks.
+**** This combination lead to an inability to build the feed in under 90 seconds and 64mb of RAM.  Since php.ini limits to 30 seconds and 16MB, this is fail.
+*** Solution:
+**** Never feed Model result arrays straight into sanitizing.
+**** Build an intermediate array, as flat as possible, with only the minimal amount of data necessary for the View.
+**** This reduces both the recursion and work sanitizing needs do to in general.
+*** Bonus:
+**** Learned all about using XDebug with 650MB cachegrind files, which don't work in webgrind and require KCachegrind or WinCachegrind to view.
+**** Turning on function tracing (separate from profiling) offers a peek at memory usage from call to call.
+**** CakePHP adds 100000's of function calls of overhead, for what it's worth.