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Xcode has an app called Instruments and you can use it to gather all sorts of CPU and memory statistics both live as the device runs and to save for analysis over time. This use of the tool doesn't require a developer account, any paid software, or a jailbroken device. You do need to set up the devices in Xcode's organizer to indicate you wish to use them ...

Here's what I would do to actually try and fix the problem. We will completely reset iMessage. First up, log out of all accounts from Messages and Facetime, and then close them down. Create two folders on your Desktop: Messages, and Preferences. With Finder as the active application, hit shift ⌘ cmd G and enter in ~/Library/Messages/. Drag the contents of ...

While valgrind can be installed, the current state isn't very usable. In a simple program I got the following result; ==16016== ==16016== HEAP SUMMARY: ==16016== in use at exit: 63,264 bytes in 364 blocks ==16016== total heap usage: 516 allocs, 152 frees, 67,154 bytes allocated ==16016== ==16016== LEAK SUMMARY: ==16016== definitely lost: 8,624 ...

Assuming you can be bothered, if you install MacPorts you will be able to install a functioning Valgrind (3.8.1 as for today) on your system. Unfortunately MacPorts will require you to install the whole XCode, not just the CL tools, so YMMV.

I don’t really know the right answer, but I have a guess. You mention that you use safari on Windows, but you don’t mention the window’s version. In any case, the extreme load your computer had (in terms of RAM/HDD) might have caused a corruption in the Safari’s config and/or cache. Your computer, in an effort (desperate!) to save its information and write ...