Float16Array lookups appear to be much less performant compared to Float32Array lookups about float16

[zloirock]

It's logical. So sensitive to performance features like typed array magic is impossible to make so performant only in the userland as performant they can be done in engines internals. If you need them only for performance, it's better to avoid polyfills. However, they are fine for cases when performance is not so critical, you need them for something else like ToFloat16 conversion, backward compatibility, etc.

[petamoriken]

FYI: https://github.com/tc39/proposal-float16array

[petamoriken]

Unfortunately, Float16Array is not as fast in performance. Each time you get or write a value, it is converted by Proxy.

If you are concerned about performance, it is recommended to keep the data as a Uint16Array and use only getFloat16 and setFloat16 provided by this library.