Hi @irinashl,
Thank you for your interest and feedback for the Jetpack Boost plugin.
HTML minification is certainly a feature which can help to support the overall performance of a site.
With the first iteration of the Jetpack Boost plugin, we decided first to concentrate on optimizations that we believe will make the most significant impact for the performance of a site. Optimizing CSS Loading, Deferring Non-Essential JavaScript and Lazy Image Loading are the 3 first features which, when applied, should hopefully make a clear increase in the page speed score a site, unless of course the site is already pretty much optimized already.
We are working on bringing much more improvements in future releases and hopefully including features such as resources (HTML/JS/CSS) minification to improve further performances. Please stay tune ??
In the meantime if you have other ways to apply HTML minification to your site, you should certainly do.
Thank you for your feedback. Please do not hesitate to get in touch again if you have more feedback or questions.
Best,
David