Which free bug tracking tool gives better performance out of four tools (Bug Note, Mantis, Bug Tracker .NET, Trac)?

I have selected four free tools for web based defect tracking. 开发者_如何学GoThey are:

• Bug Notes
• Mantis
• Bug Tracker .NET
• Trac from Project Locker Software

I am trying to decide between these four tools, given the following considerations:

1. If I Create 5 bugs in each tool, and click on 'report'. Can we generate graphs (bar graph, pie chart) or reports from any of them or all of them?
2. Which tool is taking less time for creating 5 bugs?
3. Which tool is taking less time does to launch the application in each tool?
4. If I upload a 500 MB document in each tool, which one takes less time or whether the tool is able to handle this size?
5. Whether the reports are generated by who raised the defect or the name of the defect assigned person?

Following all the considerations is mandatory. Can anyone please suggest to me which one is good with the above considerations?

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You can use mantis or Bug Tracker .NET.. both are very user friendly.. You can generate graph in both tool. You can generate report by category,day,month,priority, by user,status etc..