I know about instant.page for a long time, but never used it on production because:
1) i usually remember about it when i have 0 ideas how to further optimize the page (meaning, it is very fast already) and using it actually didnt change anything (for the better)
2) when page is slow there is usually a bigger fish to fry and fundamental problem to solve, that instant.page will only mask (i prefer seeing red errors than wonder whats wrong)
But for those who are looking for quick wins thats probably a good direction. I also recommend looking at:
I know about instant.page for a long time, but never used it on production because:
1) i usually remember about it when i have 0 ideas how to further optimize the page (meaning, it is very fast already) and using it actually didnt change anything (for the better)
2) when page is slow there is usually a bigger fish to fry and fundamental problem to solve, that instant.page will only mask (i prefer seeing red errors than wonder whats wrong)
But for those who are looking for quick wins thats probably a good direction. I also recommend looking at: