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  1. Qt
  2. QTBUG-140

Improve performance of QImageReader and JPEG files

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Details

    • Suggestion
    • Resolution: Duplicate
    • P2: Important
    • Some future release
    • 4.1.3
    • Image formats
    • None

    Description

      Improve performance of QImageReader and JPEG files. When QImageReader is compared with an app like gthumb, the difference in speed is quite great when it comes to processing JPEG files, however when it comes to PNG files they are more or less the same.

      Qt 4.2 will have a performance increase of roughly 10% over 4.1 when setting a scaled size on the reader. We will look into optimizing this further for a future release.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-40091 Qt optimization suggestion: replace bundled libjpeg with SIMD optimized libjpeg-turbo

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              Unassigned Unassigned
              anshaw Andy Shaw (closed Nokia identity) (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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