2.3 Intel Core i5, 8 GB RAM, OS X 10.9.2

Pass 1:

Running [zsh-5.0.7]:                     string_test      48631,87
Running [zsh-5.0.8]:                     string_test      86302,14
Running [zsh-5.1]:                       string_test      87970,33
Running [zsh-36926]:                     string_test      86682,35

Running [zsh-5.0.7]:                     array_test       87699,03
Running [zsh-5.0.8]:                     array_test       91540,41
Running [zsh-5.1]:                       array_test       82907,69
Running [zsh-36926]:                     array_test       82203,27

Running [zsh-5.0.7]:                     function_test    44150,02
Running [zsh-5.0.8]:                     function_test    47915,24
Running [zsh-5.1]:                       function_test    48448,95
Running [zsh-36926]:                     function_test    57126,86

Running [zsh-5.0.7]:                     search_test      55862,93
Running [zsh-5.0.8]:                     search_test      51480,07
Running [zsh-5.1]:                       search_test      51027,38
Running [zsh-36926]:                     search_test      10274,11

Pass 2:

Running [zsh-5.0.7]:                     string_test      48799,25
Running [zsh-5.0.8]:                     string_test      86682,21
Running [zsh-5.1]:                       string_test      86698,42
Running [zsh-head-8e9a68a]:              string_test      38887,54
Running [zsh-36926]:                     string_test      86497,62

Running [zsh-5.0.7]:                     array_test       86754,03
Running [zsh-5.0.8]:                     array_test       82451,51
Running [zsh-5.1]:                       array_test       82880,56
Running [zsh-head-8e9a68a]:              array_test       82276,80
Running [zsh-36926]:                     array_test       83075,01

Running [zsh-5.0.7]:                     function_test    45516,67
Running [zsh-5.0.8]:                     function_test    49122,46
Running [zsh-5.1]:                       function_test    49070,83
Running [zsh-head-8e9a68a]:              function_test    56299,14
Running [zsh-36926]:                     function_test    54456,34

Running [zsh-5.0.7]:                     search_test      57267,29
Running [zsh-5.0.8]:                     search_test      50841,91
Running [zsh-5.1]:                       search_test      51321,70
Running [zsh-head-8e9a68a]:              search_test      10071,26
Running [zsh-36926]:                     search_test      10260,60