title: Adb transfers file with a very slow speed
body: <p>I'm having a problem with adb on my machine, it runs on OSX Yosemite. I was trying to <code>adb install</code> a 44mb apk and it took 5 minutes for the apk to be installed. I try to narrow the problem, and it seems that the <code>adb push</code> has something to do with this.</p>
  
  <p>I tested with <code>adb push -p src dest</code> to see the transfer progress. The transfer works fine for small files, leaving about 1300KB/s transfer rate. It slows down a lot when transferring large files, about 120KB/s transfer rate. The transfer always slows down at byte 8388608/total.</p>
  
  <p>I've tested adb push with the same device and same USB cable at my coworker's Mac using OSX Yosemite and it works fine. I don't know what causes the problem, could somebody help me?</p>