Keen Yee Liau 6052b12fb3 fix(language-service): Use module resolution cache (#32479)
This PR fixes a critical performance issue where the language
service makes a MASSIVE number of filesystem calls when performing
module resolution.
This is because there is no caching. To make matters worse, module
resolution is performed for **every** program change (which means every
few keystrokes trigger a massive number of fs calls).

PR Close #32479
2019-09-10 06:31:59 -04:00
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