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LSIF indexing performance degraded #68750

@gundermanc

Description

@gundermanc

Version Used: 4.7.0-3.23316.3

Steps to Reproduce:

  1. Use the LSIF generator on bin logs from http://devdiv.visualstudio.com/DevDiv/_git/VS-Platform repo.
  2. Compared to earlier versions, indexing seems to take 2-4X as long.
  3. You can see the impact here in this build: https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=7962757&view=logs&j=0bc77094-9fcd-5c38-f6e4-27d2ae131589&t=ebb084b3-ee0b-5e49-8d20-930a88149ff4. Indexing goes from a ~5 min step in earlier builds to 20+ minutes in this one.

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