New Addon: Timing Blocks and Line-By-Line Profiling for Debugger

[Joeclinton1]

Resolves #7418

Changes

This is the biggest addon I've made to date. It adds:

• two new blocks: "start timer" and "stop timer"
  • the block-switching addon is modified to account for these blocks
• a new tab for debugger called "Timing"
• Timing tab use a logView to show a table of the stored timing data from the started timers
  • The info shown is: Total Time, Average Time, Percent Time, Call count
  • Via a setting you can replace Percent Time with Ratio time, which is the total time divided by the minimum total time
  • Every logged timer has a label either with the timer name or the block name, which is clickable and takes you to the start timing/ block line.
• A "tools" button is added which when clicked shows a dropdown toolbar. The toolbar has 3 buttons:
  • View Line-by-line: This triggers a custom profiler to enable itself, and begin tracking line by line times. Each line adds it's own timer
  • Show RTC: this begins tracking the Relative Time Cost (RTC) for each line. Where RTC is a precomputed time cost which is derived from the total set of block used in the line. When RTC is shown a column is added displaying elapsed RTC for each column
  • Show Heatmap: this recolours the block line associated with each timer, with a heatmap colour scale to visually represent the percentage time of that line.
  • If heatmap is shown, then a slider appears that lets you adjust the maximum heatmap range.
• clicking the table headers sorts the column
• there is a setting which lets you automatically stop the previous timer when a start timer is called, which helps if you want to have many consecutive timers. (also cuts down on overhead)
• an export button, will export the timing table in csv format

Reason for changes

See #7418

Tests

The functionality described in Changes has been tested and works.

Remaining stuff:

• Making RTC account for blocks that are selected via dropdown
• Making RTC account for o(n) time blocks
• Make RTC account for blocks that depend on the size of the sprite
• Make RTC account for stamp blocks dependency on bitmap/vector
• Localise all the strings