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7. Compare and Contrast Two Recordings in the JRA Tool

The JRA Tool is excellent to use for comparing and contrasting recordings. Open both recordings in the JRA Tool and lay them next to each other to compare the results.

To compare and contrast JRA recordings
  1. Create two recordings, one for each setting you wish to try.
  2. Open both recordings and lay them out in the JRA Tool next to each other (Figure 2-5).
    3. Figure 2-5 Comparing two JRA recordings in the JRA Tool


    Comparing two JRA recordings in the JRA Tool

    Figure 2-5 shows the difference in Java heap content between two JRA recordings. The upper recording has much more dark matter than the lower one. The dark matter can cause disk fragmentation and will eventually slow down your application.

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