#351 Add functions for perf audit

[Anonymous]

Originally created by: ziflex
Originally owned by: ziflex

The purpose of the feature is to allow user test their web applications and measure their performance.

Needs to add a set of functions that utilize Chrome's profilers:

• HTML::PERF::TRACE::START && HTML::PERF::TRACE::STOP
• HTML::PERF::CPU::START && HTML::PERF::CPU::STOP
• HTML::PERF::MEMORY::START && HTML::PERF::MEMORY::STOP
• HTML::PERF::MEMORY::START && HTML::PERF::MEMORY::STOP
• HTML::PERF::MEMORY::SNAPSHOT

HTML::PERF::TRACE starts Chrome's tracer. It can be examined in Performance tab of Devtools.
HTML::PERF::CPU starts CPU profiler. It can be examined in JavaScript Profiler tab in Devtools.
HTML::PERF::MEMORY starts CPU profiler. It can be examined in Memory tab in Devtools.
HTML::PERF::MEMORY::SNAPSHOT creates a heap snapshot. It can be examined in Memory tab in Devtools.