stat: Speed up StatNameTest.TestDynamic100k by covering only sizes near powers of 2 (#11180)
stat: Speed up StatNameTest.TestDynamic100k by covering only sizes near powers of 2 (#11180)

It's interesting to cover encoding-tests for strings of size of powers of 2, and a few size increments above & below. But the previous test was testing every single size possibility and most of them are boring. This resulted in excessive tsan test times.

Signed-off-by: Joshua Marantz <c3f6b7d9de5243f9f0884ee043fd42ff9df5f177@google.com>
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