Improve Xlsx Reader Speed #4153
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PR PHPOffice#4132 was needed for release 2.2.2 because of a problem with Excel 2016 introduced with 2.2.0. This is a minor tweak to that change - a little simpler, and possibly beneficial if the spreadsheet uses split screens.
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PR #4132 was needed for release 2.2.2 because of a problem with Excel 2016 introduced with 2.2.0. This is a minor tweak to that change - a little simpler, and possibly beneficial if the spreadsheet uses split screens.
In addition, a performance problem has been identified (issue #3917) which this PR will attempt to fix.
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Why this change is needed?
Provide an explanation of why this change is needed, with links to any Issues (if appropriate).
If this is a bugfix or a new feature, and there are no existing Issues, then please also create an issue that will make it easier to track progress with this PR.