All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=668404

Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?keys=agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgm62bsgoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICgm56gvwkM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg24iKuQoM,agxzfmNocm9tZXBlcmZyFAsSB0Fub21hbHkYgICg2-LetAoM


Bot(s) for this bug's original alert(s):

webrtc-linux-large-tests

sergeyu@: These regressions seems related to your CL https://codereview.webrtc.org/2458863002. Could you please take a look?

Small increase in ramp-up time is expected there. In exchange BW probing now is more reliable, particularly when signaling channel is slow.