- `keep_infinity` -- default `false`. Pass `true` to prevent `Infinity` from
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__ */`)
+
+
### The `unsafe` option
It enables some transformations that *might* break code logic in certain