1，页面打开速度，
可以使用runtime实现，主要统计viewdidload()到viewdidAppear的时间
2，内存使用值
#include <mach/task_info.h>
#include <mach/mach.h>
+ (unsigned long)memoryUsage
{
struct task_basic_info info;
mach_msg_type_number_t size = sizeof(info);
kern_return_t kr = task_info(mach_task_self(), TASK_BASIC_INFO, (task_info_t)&info, &size);
if (kr != KERN_SUCCESS) {
return -1;
}
unsigned long memorySize = info.resident_size >> 10；
return memorySize;
}
获取到了数据存入数组那接下来的事情就是上报策略的制定了。没必要每次获取数据都上报，可以设置每次启动上报上一次session的全部记录就好，启动后隔个10秒或20秒错开请求高峰期。上报时的数据结构也要尽可能的精简，因为不能对用户的流量造成太大的损失，也可以选择先压缩后再上传。
3 CPU占用率
+ (CGFloat)cpuUsage
{
thread_array_t thread_list;
mach_msg_type_number_t thread_count;
thread_info_data_t thinfo;
mach_msg_type_number_t thread_info_count;
thread_basic_info_t basic_info_th;
// get threads in the task
kern_return_t kr = task_threads(mach_task_self(), &thread_list, &thread_count);
if (kr != KERN_SUCCESS) {
return -1;
}
CGFloat tot_cpu = 0;
for (int j = 0; j < thread_count; j++)
{
thread_info_count = THREAD_INFO_MAX;
kr = thread_info(thread_list[j], THREAD_BASIC_INFO,(thread_info_t)thinfo, &thread_info_count);
if (kr != KERN_SUCCESS) {
return -1;
}
basic_info_th = (thread_basic_info_t)thinfo;
if (!(basic_info_th->flags & TH_FLAGS_IDLE)) {
tot_cpu = tot_cpu + basic_info_th->cpu_usage / (CGFloat)TH_USAGE_SCALE * 100.0;
}
} // for each thread
//free mem
kr = vm_deallocate(mach_task_self(), (vm_offset_t)thread_list, thread_count * sizeof(thread_t));
assert(kr == KERN_SUCCESS);
return tot_cpu;
}
4.页面的帧率
_link = [CADisplayLink displayLinkWithTarget:self selector:@selector(tick:)];
[_link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
- (void)tick:(CADisplayLink *)link {
if (_lastTime == 0) {
_lastTime = link.timestamp;
return;
}
_count++;
NSTimeInterval delta = link.timestamp - _lastTime;
if (delta < 1) return;
_lastTime = link.timestamp;
float fps = _count / delta;
_count = 0;
}
