Engine slow down and Infinite loop detection

[rawsrc]

Hi,

i was told by several users using PhpEcho in their business app, that they have noticed a general slow down of the engine.
After some tests, the reason is the new feature: infinite loop detection. It's time-consuming and grab some server resources in production to be done.

That's why i made this feature as an option, disabled by default in the version 6.1.1

rawsrc

[rawsrc]

Just watch the test file infinite_loop.php, if you un-comment the last test (infinite_loop_03'), the server will crash because of an undetected infinite loop.