[PATCH] D27960: Use exact vector capacities to store DWARF line tables

[Simon Que via Phabricator via llvm-commits]

sque added a comment.

mehdi_amini asked: "Isn't there a way to `reserve()` appropriately initially?"

Not trivially. Look at the while loop that precedes the new code. It looks through the line table but doesn't know beforehand how many Rows there are.

One possible optimization is to first have a dry-run that counts the number of Rows, reserves memory for them, and then runs through again to create the Rows.


https://reviews.llvm.org/D27960