Reduce latency of low-volume debugPrint output
Reduce latency of low-volume debugPrint output

If we haven't printed anything for a second, then reset the count of how
much we've printed.

I also reduced the amount of data to ~16kb until we pause because I saw
some corruption even pausing 1 second every ~32kb. (Numbers are
approximate because we're counting UTF-16 characters and some of the
characters in the output are multiple bytes in UTF-8.)

mikejurka/engine,lyceel/engine,devoncarew/engine,mikejurka/engine,chinmaygarde/sky_engine,aam/engine,jamesr/flutter_engine,jason-simmons/flutter_engine,aam/engine,devoncarew/sky_engine,devoncarew/engine,jason-simmons/flutter_engine,jamesr/flutter_engine,Hixie/sky_engine,mxia/engine,mpcomplete/flutter_engine,chinmaygarde/flutter_engine,flutter/engine,jason-simmons/sky_engine,cdotstout/sky_engine,flutter/engine,devoncarew/sky_engine,rmacnak-google/engine,abarth/sky_engine,mikejurka/engine,abarth/sky_engine,mpcomplete/engine,tvolkert/engine,Hixie/sky_engine,krisgiesing/sky_engine,tvolkert/engine,lyceel/engine,jamesr/flutter_engine,Hixie/sky_engine,jason-simmons/flutter_engine,mpcomplete/flutter_engine,jamesr/sky_engine,tvolkert/engine,aam/engine,devoncarew/sky_engine,jason-simmons/sky_engine,chinmaygarde/flutter_engine,flutter/engine,mpcomplete/flutter_engine,cdotstout/sky_engine,krisgiesing/sky_engine,chinmaygarde/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,jason-simmons/flutter_engine,mpcomplete/engine,chinmaygarde/sky_engine,rmacnak-google/engine,mpcomplete/flutter_engine,abarth/sky_engine,krisgiesing/sky_engine,aam/engine,cdotstout/sky_engine,devoncarew/sky_engine,jamesr/flutter_engine,tvolkert/engine,jason-simmons/sky_engine,jamesr/sky_engine,cdotstout/sky_engine,mpcomplete/flutter_engine,aam/engine,jamesr/flutter_engine,mxia/engine,mikejurka/engine,krisgiesing/sky_engine,lyceel/engine,aam/engine,jason-simmons/sky_engine,mxia/engine,flutter/engine,mpcomplete/engine,mikejurka/engine,Hixie/sky_engine,chinmaygarde/sky_engine,mpcomplete/engine,chinmaygarde/flutter_engine,jamesr/flutter_engine,aam/engine,chinmaygarde/sky_engine,rmacnak-google/engine,chinmaygarde/flutter_engine,jamesr/sky_engine,aam/engine,rmacnak-google/engine,mxia/engine,jamesr/flutter_engine,tvolkert/engine,jamesr/sky_engine,tvolkert/engine,devoncarew/engine,chinmaygarde/sky_engine,devoncarew/engine,krisgiesing/sky_engine,jason-simmons/flutter_engine,mxia/engine,jason-simmons/sky_engine,mikejurka/engine,devoncarew/sky_engine,lyceel/engine,cdotstout/sky_engine,jamesr/sky_engine,chinmaygarde/sky_engine,abarth/sky_engine,mpcomplete/engine,krisgiesing/sky_engine,lyceel/engine,rmacnak-google/engine,jamesr/flutter_engine,mxia/engine,devoncarew/engine,devoncarew/sky_engine,mpcomplete/engine,devoncarew/sky_engine,flutter/engine,Hixie/sky_engine,lyceel/engine,Hixie/sky_engine,chinmaygarde/flutter_engine,flutter/engine,flutter/engine,chinmaygarde/sky_engine,abarth/sky_engine,mikejurka/engine,devoncarew/engine,mxia/engine,mpcomplete/flutter_engine,jason-simmons/flutter_engine,jamesr/flutter_engine,chinmaygarde/flutter_engine,cdotstout/sky_engine,rmacnak-google/engine,devoncarew/engine,Hixie/sky_engine,mxia/engine,cdotstout/sky_engine,jamesr/sky_engine,mpcomplete/engine,tvolkert/engine,jason-simmons/sky_engine,abarth/sky_engine,flutter/engine,mpcomplete/engine,jamesr/sky_engine,rmacnak-google/engine,abarth/sky_engine,krisgiesing/sky_engine,mikejurka/engine,jason-simmons/sky_engine,Hixie/sky_engine,lyceel/engine,mikejurka/engine