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{ Tag Archives } graphviz

performance annotated SQLite EXPLAINation visualizations using systemtap

For the Thunderbird 3.1 release cycle we are not just fixing UX problems but also resolving various performance issues.  The key to defeating performance problems, like the key to defeating bad guys in movies, is to make sure they are dead.  If you want to fight the bad guy again, you can just assume that [...]

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2010 04 06 Andrew Sutherland Debugging
Mozilla
Program Execution
Thunderbird
Visualizing Comments (3)

visualization of control-flow/data-flow analysis of sqlite EXPLAIN-ations

While doing some work on the gloda-based search targeted for beta 2, I came upon some query slowness and decided to look into it.  Because gloda queries are (conceptually, at least) dynamic, we also generate dynamic SQL.  Our schema is fairly normalized, and it’s not always obvious to me what I can expect to have [...]

Also tagged
2009 02 04 Andrew Sutherland Debugging
Program Execution
Visualizing Comments (4)