Brock Whittaker 6079584c85 perf: Use offsetHeight rather than getBoundingClientRect() in condenser. ...

Using the offsetHeight getter is ~2.5x faster than
getBoundingClientRect() on what can be an expensive operation to do in
the hundreds of times.

Note: Tim thinks that this may have been different a few years ago,
since we tested fairly carefully before settling on
getBoundingClientRect, but benchmarks pretty clearly show offsetHeight
is faster today, so we should use that.

2017-01-04 12:42:16 -08:00

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