Zend Optimizer を入れてみました。

Zend Optimizer 3.3.3 を入れてみました。
その結果が以下の通り。
若干サーバー負荷が下がった気もしましたが、数値的には変化なし・・・
この程度では変わらない模様。

C:\xampp\apache\bin>ab -n 100 -c 10 http://www.***.jp/
This is ApacheBench, Version 2.3 <$Revision: 655654 $>
Copyright 1996 Adam Twiss, Zeus Technology Ltd, http://www.zeustech.net/
Licensed to The Apache Software Foundation, http://www.apache.org/

Benchmarking www.***.jp (be patient).....done

Server Software:        Apache/2.2.3
Server Hostname:        www.***.jp
Server Port:            80

Document Path:          /
Document Length:        37383 bytes

Concurrency Level:      10
Time taken for tests:   160.969 seconds
Complete requests:      100
Failed requests:        30
(Connect: 0, Receive: 0, Length: 30, Exceptions: 0)
Write errors:           0
Total transferred:      3761370 bytes
HTML transferred:       3738270 bytes
Requests per second:    0.62 [#/sec] (mean)
Time per request:       16096.875 [ms] (mean)
Time per request:       1609.688 [ms] (mean, across all concurrent requests)
Transfer rate:          22.82 [Kbytes/sec] received

Connection Times (ms)
min  mean[+/-sd] median   max
Connect:        0    0   2.7      0      16
Processing:  7578 15768 4740.2  14875   32375
Waiting:     1844 8666 4356.4   8016   21125
Total:       7594 15769 4739.8  14875   32375

Percentage of the requests served within a certain time (ms)
50%  14875
66%  16313
75%  16906
80%  18688
90%  23125
95%  25828
98%  31516
99%  32375
100%  32375 (longest request)