Only search for nested arrow functions if necessary #342
+39
−29
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#334 caused a performance regression. This line was now performing a large scope search for every token when searching for a variable's scope in order to find the scope of nested arrow functions, even if the current variable was not inside an arrow function.
In this diff we prevent searching for the next level of an arrow function if we don't find an arrow function token at all.
Fixes #340