[perf-improver] perf: eliminate per-tick allocations in GenerateLinesToRender via cached buffers#9012

Evangelink merged 2 commits into

mainmicrosoft/testfx:mainfrom

perf-assist/cache-generate-lines-buffers-6fd45318b897118fmicrosoft/testfx:perf-assist/cache-generate-lines-buffers-6fd45318b897118fCopy head branch name to clipboard