Clarence questions

Clarence answers

• Gzip or ob_flush()? which is better?
• Test multiple class with same PHPUnit test case
• How banning in Varnish works?
• if variable twig on symfony
• Get first character of a string, that is a French accent [duplicate]
• Excluding a specific URL from Varnish cache
• How to read output of varnishtop?
• mysql_fetch_array returns duplicate data
• Are ESI blocking or non-blocking?
• What is the use of MongoDB in GrayLog2?