[syslog-ng] 3.4 - degraded single threaded performance

I took one of my syslog-ng 3.3 configuraiton files, which happens to read from a named pipe (/var/local/somename) and ran version 3.4rc2 against it. I was only able toread bout 2,000 messages/sec through the pipe. With threaded(yes) I could read 100,000+/sec. With syslog-ng 3.3 I could read 100,000+/sec Is this the expected behaviour of threaded(no) with syslog-ng 3.4 I just wanted to ask prior to created the minimal config and lgging a bug report. Evan.