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Re: case strings

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On 6/3/12 11:40 AM, Roedy Green wrote:
> has anyone benchmarked or decompiled to see how the new case string
> labels are compiled.  Are they faster than setting up a HashMap to
> classify the strings?  In theory they could be since the literal
> values are known at compile time, where HashMap does not have that
> advantage.
>
It took me a second to realize you meant switch/case with Strings. I 
thought you were talking about letter case and case sensitivity, and the 
rest became a non sequitur.

I haven't looked into the mechanisms specifically, but I would imaging 
there could be significant optimizations that could be done at compile 
time (java->bytecode or bytecode->native), depending on size of the 
switch statement.

On the other hand, a Map has other advantages (like being able to be 
dynamically defined).  Use what ever is clearest for your use-case, then 
if, and only if, it isn't fast enough (as indicated by profiling tools), 
optimize it.

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Thread

case strings Roedy Green <see_website@mindprod.com.invalid> - 2012-06-03 11:40 -0700
  Re: case strings Daniel Pitts <newsgroup.nospam@virtualinfinity.net> - 2012-06-03 13:37 -0700
    Re: case strings markspace <-@.> - 2012-06-03 19:19 -0700
    Re: case strings Roedy Green <see_website@mindprod.com.invalid> - 2012-06-04 07:53 -0700
      Re: case strings Lew <noone@lewscanon.com> - 2012-06-05 23:53 -0700
  Re: case strings Roedy Green <see_website@mindprod.com.invalid> - 2012-06-04 07:57 -0700
    Re: case strings "Mike Schilling" <mscottschilling@hotmail.com> - 2012-06-04 08:18 -0700
    Re: case strings Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-06-04 11:30 -0400
      Re: case strings Lew <noone@lewscanon.com> - 2012-06-06 00:15 -0700

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