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Our current version is, unfortunately, CPU intensive. We are working to fix this. It is probably that the flash test is utilizing ALL your CPU during the animation phase, and this is depressing the results.
We expect to release a test that will work for slower CPUs very soon.
Possible reason #2
Some fixed wireless ISPs are getting artificially low results for UPLOAD SPEED under flash. This pattern is not just our flash test -- all flash tests show the problem, and some other technology online speed tests show it as well. Our Java test, and a basic ftp test, do not show this problem. We don't yet have an idea why this may be, but we are collecting data.
Possible reason #3
The flash plugin is not efficient enough to test VERY HIGH SPEED connections (fiber). If you are on fiber, you are advised to stick to the Java plugin-based speed test, which can test 100mbit and beyond. Flash is unable to fully utilize a 100mbit connection, so it under reports very fast connections.
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