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
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