How to get memory usage in Swift [duplicate]

Answer 1

Finally I found a solution. Please see below code snippet.

func report_memory() {
    // constant
    let MACH_TASK_BASIC_INFO_COUNT = (sizeof(mach_task_basic_info_data_t) / sizeof(natural_t))

    // prepare parameters
    let name   = mach_task_self_
    let flavor = task_flavor_t(MACH_TASK_BASIC_INFO)
    var size   = mach_msg_type_number_t(MACH_TASK_BASIC_INFO_COUNT)

    // allocate pointer to mach_task_basic_info
    var infoPointer = UnsafeMutablePointer.alloc(1)

    // call task_info - note extra UnsafeMutablePointer(...) call
    let kerr = task_info(name, flavor, UnsafeMutablePointer(infoPointer), &size)

    // get mach_task_basic_info struct out of pointer
    let info = infoPointer.move()

    // deallocate pointer
    infoPointer.dealloc(1)

    // check return value for success / failure
    if kerr == KERN_SUCCESS {
        println("Memory in use (in MB): \(info.resident_size/1000000)")
    } else {
        let errorString = String(CString: mach_error_string(kerr), encoding: NSASCIIStringEncoding)
        println(errorString ?? "Error: couldn't parse error string")
    }    
}