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Minor performance tweaks
git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@85743 2327b42d-5241-43d6-9e2a-de5ac946f064
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@@ -65,7 +65,7 @@ class PHPExcel_Shared_XMLWriter extends XMLWriter {
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$this->openMemory();
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} else {
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// Create temporary filename
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if (is_null($pTemporaryStorageFolder))
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if ($pTemporaryStorageFolder === NULL)
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$pTemporaryStorageFolder = PHPExcel_Shared_File::sys_get_temp_dir();
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$this->_tempFileName = @tempnam($pTemporaryStorageFolder, 'xml');
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