PEP 238 discusses how `1 / 2` differing from `1 / 2.0` can be confusing : http://t.co/lkTAIPcEEo . I wonder if Ruby will change similarly?
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What are the most popular languages that have used an AST walker for their implementation?
I know Ruby used to do this, but there must be others.
(I'm interested in the lowest PL speed that users will tolerate if you have awesome features.)
It's really satisfying to use a profiler for the first time on a project. I always find a big performance win with only a small code change.
It's never the code that I expected to be slow, however!
I'm experimenting with diagnostics formatting.
* I've added a left margin, showing both the file name and line numbers
* I'm showing one line of context above/below the offending line.
* I'm using grey for comments.
What do you think? Is there anything you'd change?