Description:
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This little code snippet is used to connect to gatewaybeta.fedex.com to transfer XML documents back and forth.   The problem we're having is that this segment will cause the php.exe in a windows 2000 multi-threaded enviroment  to run at 99% to 100% for a short burst (rougly 4 to 5 seconds).  Especially if the script runs at the same time, the server's resources are exhausted right away! :(  We've definitly narrowed the execution time and CPU burst problem down to Curl but not sure how to go about fixing it.  

We've tried upgrading the libCurl library for PHP to the newer version 7.11.2 but there are no compiled DLL's for Windows servers.  Any ideas?


Our Config:
stem 	Windows NT TESTCOT 5.0 build 2195
Build Date 	Apr 14 2004 17:17:11
Server API 	CGI/FastCGI
Virtual Directory Support 	enabled
PHP API 	20020918
PHP Extension 	20020429
Zend Extension 	20021010
Debug Build 	no
Thread Safety 	enabled
Registered PHP Streams 	php, http, ftp, compress.zlib
CURL Information 	libcurl/7.10.5 OpenSSL/0.9.7b zlib/1.1.4


Reproduce code:
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$this->ch = curl_init ();
curl_setopt ($this->ch, CURLOPT_URL, "$this->postServ")
curl_setopt ($this->ch, CURLOPT_RETURNTRANSFER,1); 	
curl_setopt ($this->ch, CURLOPT_TIMEOUT, 10); 			
curl_setopt ($this->ch, CURLOPT_CUSTOMREQUEST, $req); 		
curl_setopt ($this->ch, CURLOPT_SSL_VERIFYPEER, 0);

$result = curl_exec ($this->ch);
$err_nr = curl_errno($this->ch);
curl_close ($this->ch);

Expected result:
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The code executes properly, but CPU usage is at 99% to 100% for 4 to 5 seconds while CURL is executing.