Mat Mannion created LOGBACK-1345: ------------------------------------ Summary: Support %F in access logs for time to first byte Key: LOGBACK-1345 URL: https://jira.qos.ch/browse/LOGBACK-1345 Project: logback Issue Type: New Feature Components: logback-access Environment: Tomcat 8.5 Reporter: Mat Mannion Assignee: Logback dev list Currently [PatternLayout|https://logback.qos.ch/xref/ch/qos/logback/access/PatternLayout.html] supports {{%D}} for the total elapsed time (i.e. the time, in milliseconds, that the request was first received, to the time the last byte was sent to the client) but doesn't support {{%F}}, which is the time to the first byte being sent to the client. The [implementation in Tomcat|https://github.com/apache/tomcat/blob/91c3e7b61f3289dba83e35569c5d06a0c140c2...] appears, on the face of it, reasonably simple to replicate in {{AccessEvent}} -- This message was sent by Atlassian JIRA (v7.3.1#73012)