ICEpdf
  1. ICEpdf
  2. PDF-627

Core library is spending quite a bit of time garbage collecting

          Details

          • Type: Bug Bug
          • Status: Closed
          • Priority: Major Major
          • Resolution: Fixed
          • Affects Version/s: 5.0.2
          • Fix Version/s: 5.0.3
          • Component/s: Core/Parsing
          • Labels:
            None
          • Environment:
            any

            Description

            A few users have point at this but I thin I finally found the cause. When working though a large document there is an eventual slow down and there is a lot of time spent doing garbage collection. As a result of this collection the UI feels really slow.

            I kicked the tires a bit and found that the we are using Softreferences for just about everying, which make it hard for the garbage collector to know what to do.

              Activity

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              Patrick Corless created issue -
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              Patrick Corless added a comment -

              I updated the Library's ConcurrentHashMap for refs and lookupReference2ICCBased to use WeakReferences to give the GC a better hint of what can be pruned. As a result of this simple change the UI is buttery smooth while scrolling through a document with thousands of pages. The memory usage also seems to stay much further below the max memory.

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              Patrick Corless added a comment - I updated the Library's ConcurrentHashMap for refs and lookupReference2ICCBased to use WeakReferences to give the GC a better hint of what can be pruned. As a result of this simple change the UI is buttery smooth while scrolling through a document with thousands of pages. The memory usage also seems to stay much further below the max memory.
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #37290 Wed Jul 31 17:00:52 MDT 2013 patrick.corless PDF-627 update the ConcurrentHashMap caches to use WeakReferences instead of SoftReferences to help speed up garbage collection.
              Files Changed
              Commit graph MODIFY /icepdf/branches/icepdf-5.0.1/icepdf/core/src/org/icepdf/core/util/Library.java
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              Patrick Corless added a comment -

              Updated both the trunk and the 5.0.1 branch with the library changes

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              Patrick Corless added a comment - Updated both the trunk and the 5.0.1 branch with the library changes
              Patrick Corless made changes -
              Field Original Value New Value
              Status Open [ 1 ] Resolved [ 5 ]
              Resolution Fixed [ 1 ]
              Repository Revision Date User Message
              ICEsoft Public SVN Repository #37292 Wed Jul 31 20:35:05 MDT 2013 patrick.corless PDF-627 update the ConcurrentHashMap caches to use WeakReferences instead of SoftReferences to help speed up garbage collection.
              Files Changed
              Commit graph MODIFY /icepdf/trunk/icepdf/core/src/org/icepdf/core/util/Library.java
              Patrick Corless made changes -
              Fix Version/s 5.0.3 [ 11070 ]
              Patrick Corless made changes -
              Status Resolved [ 5 ] Closed [ 6 ]

                People

                • Assignee:
                  Patrick Corless
                  Reporter:
                  Patrick Corless
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                  Dates

                  • Created:
                    Updated:
                    Resolved: