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Comparing KDE 3.5.10 and KDE 4.2.2 memory usage

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KDE

Recently I have been checking out the memory usage of various window managers and desktop environments, concluding with a study of KDE. That led me to wonder how well KDE would work on my oldest working system, the Dell Dimension 4100 desktop. I often used KDE 3.5 on that system, and I had a KDE 3.5.9 and 3.5.10 system already installed, so last night I updated my PCLinuxOS partition on the 4100 to bring it up to date, used it for a while, then upgraded my sidux partition on the same system, bringing it up to KDE 4.2.2.

I found that both versions of KDE did swap, to a certain extent, on both PCLinuxOS (KDE 3.5.10) and sidux (KDE 4.2.2), but the memory management was excellent on each system, not too aggressive, nor too inactive, allowing swap where needed, keeping at least a modest amount of free memory at all times, and trimming swap usage when memory requirements were relieved. The result was

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