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conveyal / browsochrones

Create isochrones and accessibility images in the browser
MIT License
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computeAccessValues taking over 2 minutes and 75% of the total compute time #1

Closed trevorgerhardt closed 8 years ago

trevorgerhardt commented 8 years ago

Two notes (and why this is a Github issue).

  1. What changed recently in get-surface that would cause it to take an order of magnitude longer to compute than it did before? Most of it seems to be coming from computeAccessValues. Or is it the data?
  2. Should we be computing access values while generating the surface? What are the benefits vs computing it afterwards?
trevorgerhardt commented 8 years ago

Also, meant to mention that I temporarily disabled it in get-surface for now.

mattwigway commented 8 years ago

Are you still using the data out of S3? I added path information to the format but didn't update the files in S3 - if you use the static server in r5 it works. Otherwise there's a data format mismatch and all bets are off. Generating isohrones and accessibility is taking about 2-3 seconds for me.