I have a website (with ESI) that uses Symfony2 reverse proxy for caching. Average response is around 100ms. I tried to install Varnish on server to try it out. I followed guide from Symfony cookbook step by step, deleted everything in cache folder, but http_cache folder was still created when I tried it out. So I figured I could try to comment out $kernel = new AppCache($kernel); from app.php . That worked pretty well. http_cache wasn't created anymore and by varnishstat, Varnish seemed to be working:
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