being compressed into `1/0`, which may cause performance issues on Chrome.
- `side_effects` -- default `false`. Pass `true` to potentially drop functions
-marked as "pure". (A function is marked as "pure" via the comment annotation
-`/* @__PURE__ */` or `/* #__PURE__ */`)
+marked as "pure". A function call is marked as "pure" if a comment annotation
+`/*@__PURE__*/` or `/*#__PURE__*/` immediately precedes the call. For example:
+`/*@__PURE__*/foo()`;
### The `unsafe` option