---
layout: single
title:  "Luau Recap: March 2021"
---

Luau is our new language that you can read more about at [https://roblox.github.io/luau](https://roblox.github.io/luau). It's been a busy month in Luau!

[Cross-posted to the [Roblox Developer Forum](https://devforum.roblox.com/t/luau-recap-march-2021/).]

## Typed variadics

[TODO]

## Generic functions

[TODO]

## Typechecking improvements

* Check bodies of methods whose `self` has type `any`
* More precise types for `debug.*` methods
* Better typechecking for `Instance:IsA`.

## Performance improvements

* Significantly optimized non-variadic function calls, improving performance by up to 10% on call-heavy benchmarks
* Improve performance of `math.clamp`, `math.sign` and `math.round` by 2.3x, 2x and 1.6x respectively
* Optimized `coroutine.resume` with ~10% gains on coroutine-heavy benchmarks

## Library changes

* Added the `debug.info` function which allows retrieving information about stack frames or functions; similarly to `debug.getinfo` from Lua, this accepts an options string that must consist of characters `slnfa`; unlike Lua that returns a table, the function returns all requested values one after another to improve performance.

## New logo

Luau now has a shiny new logo!

!["New logo!"]({{ site.url }}{{ site.baseurl }}/assets/images/luau.png)

## Coming soon...

* Better treatment of cyclic requires
* [Anything else?]
