What are some common Rails performance gotchas? Just a tweet would be great, but links to blog posts, diagnostics, etc. would be awesome too
@dougcole Is there a good workaround for the lack of identity map? What are the symptoms and what is the solution?
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@wycats anytime missed includes show up in the log as "CACHE (0.0ms) SELECT...". Joins from large tables to really small tables..Thanks. Twitter will use this to make your timeline better. UndoUndo
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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@wycats Usually you just live with it, otherwise write some sort of in memory cache and a custom association between the models.Thanks. Twitter will use this to make your timeline better. UndoUndo
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