How do you test Magento performance

Question

What tools do you use to test Magento hosting performance? I need a tool to check how many customers website can have at once, with reporting. Also it will be nice if tool can show me page load time (without images and with) and give some advices for performance increase.

Answer 1

http://www.magespeedtest.com/ is quite popular in magento developers community. From time to time I see test results in twitter. You can read article from it's creator, well-known magento community developer Ashley Schroder: http://www.aschroder.com/2011/03/introducing-magespeedtest-com-v2-performance-test-magento-from-4-different-countries/