jnthn/rakudo-debugger — pull request #21 by raiph (2014-04-30 20:44:29+00:00)
Title: 10x+ speedup when 100 line script with breakpoints

line_of method needs a cache to reasonably handle larger / longer running scripts.

First tried lizmat++'s new 'is cached' trait but that caused an infinite loop somewhere.

So this patch is a manually written cache.