CPU usage optimization: removed regexp recompelation

[alexey-slivkin]

I use a lot of CamelCase function calls, and in the pprof report I see that the lion's share of the CPU is spent on compiling constant regular expressions.

I would like remove re-compilation of regular expressions on each request for helper functions.

Soulution:
#26

[gobeam]

@alexey-slivkin great I will merge it