ragged blog

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# Already learned:
# * memoization is no good for short strings, even when using symbols to lookup data.
# * String#% is very slow
# * Array#to_s is faster than Array#join, for strings of this nature
# * Interpolation is faster than either of these methods
# * Frozen strings are no aid over interpolation
# * Symbol#to_s is slower than strings, for making strings
# * ? ... : ... is actually faster than if ... else ... end, (tested on 1.8.5 win32)
# (warning, reason for this was not the operation itself, and
# using if ... then ... else ... end on one line changed that)!
# * return ... is slower than not using it
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# From #ruby-lang:
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# 02:38  flgr: interestingly, Array#empty? can be implemented as ary.inject(true) { false }
# 02:39  flgr: what this means is that you can replace  ary.empty?() ? a : b  with
#  ary.inject(a){ b }  all the time
# 02:50  flgr: raggi: you can probably make it faster by using { break b } :)
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# 02:56  LoganCapaldo: well you can write a.empty? ? b : a[0] as a.fetch(0, b) too
# 02:56  LoganCapaldo: for the case that the thingy you want is an element in the array
# 02:56  LoganCapaldo: or maybe that ony works with hashes
# 02:57  LoganCapaldo: nope it works with arrays too
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