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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">I have updated <a href="https://github.com/ceki/logback-perf" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">logback-perf</a> and added coverage the for async case. The results on my machine are published <a href="https://docs.google.com/spreadsheets/d/1cpb5D7qnyye4W0RTlHUnXedYK98catNZytYIu5D91m0/edit#gid=1763660342" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">as a Google Sheet</a>. As you point out, logback <tt>AsyncAppender</tt> performance degrades as the thread count increases. I was particularly surprised to see that Logback's <tt>AsyncAppender</tt> performance is worse that that of log4j's <tt>AsyncAppender</tt>, code that was written with JDK 1.2. </p> <p style="margin: 10px 0 0 0">Given that logback's <tt>AsyncAppender</tt> relies heavily on <tt>java.util.concurrent.ArrayBlockingQueue</tt>, unless I am missing something, the results incriminate the latter rather than the former.</p> <p style="margin: 10px 0 0 0">I am still uncomfortable with reaching any conclusions. First, as you know, a lossy <tt>AsyncAppender</tt> has stellar performance. More importantly, a real application will do more than just log in a loop. Thus, in a real application, <tt>AsyncAppender</tt> will have some breathing room. I'll try to simulate this situation with a new benchmark.</p> </td>
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