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Performance at Different Virtual Memory Settings

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The graphs below represent a performance comparison between using Virtual Memory at various setting. These results do not show what performance would be like if an application was actually running from Virtual Memory (ie there was not enough physical RAM to contain the single application or document). Virtual Memory is set in the Memory control panel Testing was done using MacBench 3.0 on a Performa 6300 with 16 MB of RAM. MacBench profiles popular software programs such as Adobe Photoshop, Word 6.0 and QuarkXpress among a variety of others and applies these profiles to the various subsystems being tested. See this description of what MacBench tests and how. Longer bars equals faster performance.

VM1 Comparison Graph

The graph below represents a performance comparison between using RamDoubler and SpeedDoubler and using Virtual Memory and SpeedDoubler. On this machine with 16MB of RAM RamDoubler will give you a total of 32MB. Virtual Memory for this test was set to 34MB giving a total of 50MB of usable RAM space. Tests show only a very slight slow down in speed when using Virtual Memory and it is believed that even higher settings for Virtual Memory will not affect speed adversely. Virtual Memory takes up the equivalent amout of disk space as toal memory (ie 16MB + 34MB in this case) and this space is not available for other purposes.

RamDoubler & SpeedDoubler vs Virtual Memory & SpeedDoubler


Comparison Graph