Slow Product Category Page WooCommerce

We are have site with more than 15000 products our category pages are very slow some times its taking more than 3 min to load page . most of the WooCommerce Queries are very slow in this

is there any way to solve this issue i saw some threads related to same issues in WooCommerce github page but Workarounds are not (https://github.com/woothemes/woocommerce/issues/4644)

Please help me on this

https://www.ads-software.com/plugins/woocommerce/