# Steal-tools 1.4.0 released **URL:** \ **Category:** StealJS\ **Created:** [July 10, 2017, 6:26pm UTC](https://forums.bitovi.com/t/steal-tools-1-4-0-released/683 "2017-07-10T18:26:54Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![matthewp](https://yyz1.discourse-cdn.com/flex035/user_avatar/forums.bitovi.com/matthewp/32/77_2.png) [@matthewp](https://forums.bitovi.com/u/matthewp)\ **Post date:** [July 10, 2017, 6:26pm UTC](https://forums.bitovi.com/t/steal-tools-1-4-0-released/683/1 "2017-07-10T18:26:54Z")
Hello everyone! steal-tools 1.4.0 has been released! This is a huge release as it contains the first version of the new `stealTools.optimize()` API, which if you have watched the contributor meetings is the “slim loader” we have talked about. Please check out the [release notes](https://github.com/stealjs/steal-tools/releases/tag/v1.4.0) to learn more. Additionally check out the [guide](https://stealjs.com/docs/StealJS.guides.optimized_builds.html) which takes the **Progressive Loading** guide to the next level by making optimized builds. ---
**Author:** ![pYr0x](https://yyz1.discourse-cdn.com/flex035/user_avatar/forums.bitovi.com/pyr0x/32/95_2.png) [@pYr0x](https://forums.bitovi.com/u/pYr0x)\ **Post date:** [July 19, 2017, 10:09pm UTC](https://forums.bitovi.com/t/steal-tools-1-4-0-released/683/2 "2017-07-19T22:09:55Z")
Does optimize can do all the stuff like build can do? E.g. Multi main or bundle ? ---
**Author:** ![matthewp](https://yyz1.discourse-cdn.com/flex035/user_avatar/forums.bitovi.com/matthewp/32/77_2.png) [@matthewp](https://forums.bitovi.com/u/matthewp)\ **Post date:** [July 20, 2017, 7:08pm UTC](https://forums.bitovi.com/t/steal-tools-1-4-0-released/683/3 "2017-07-20T19:08:06Z")
It should be able to, I’m not sure if we have multi-main tests yet or not, but I don’t see a reason for it not working. Definitely a bug if it doesn’t currently. Multi-main is a perfect use-case for optimize.