Speed Issue: Parties at a Glance about webvoteview HOT 4 CLOSED

I wrote a new version of the loader that makes the three changes above. It does seem to save us several hundred milliseconds on the load (and a decent amount of filesize), but a lot of the load time is Javascript execution--presumably writing a few thousand SVG dots is non-trivial and so I'm still not happy with the speed.

I am going to commit the changes but keep the old code around so we can switch or compare.

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All figures in ms from a pageload after a forced hard cache dump

New Code:

Old Code:

The speed improvement for the loading is actually pretty good, so I'm going go ahead and remove the old version.

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JS load times on the new code:

• Initial file / data load: 85 ms
• process data: 17 ms
• Construct dimensions for crossfilter: 172 ms
• Construct chart for DC: 56 ms
• Render Chart: 196 ms
• Attach tooltips: 48 ms
• Write party list to page: 32 ms

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The more recent version of DC is a little faster on this and I'm now satisfied with our speed on this page! Would still like rendering and crossfilter to be faster, but I don't think there's much I can do to speed it up.

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