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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="http://jira.qos.ch/browse/LOGBACK" style="color: #3b73af; text-decoration: none">logback</a> / <a href="http://jira.qos.ch/browse/LOGBACK-1227" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-static-bug-ec0fb6e2-0c49-4d65-8b01-9d685b1af1bb" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom" /></a> <a href="http://jira.qos.ch/browse/LOGBACK-1227" style="color: #3b73af; text-decoration: none">LOGBACK-1227</a>
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Issue Type:
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Affects Versions:
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1.1.7, 1.1.8, 1.1.9
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Assignee:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="logback-dev@qos.ch" id="email_logback-dev@qos.ch" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=logback-dev%40qos.ch" style="color:#3b73af;; color: #3b73af; text-decoration: none">Logback dev list</a>
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Components:
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logback-classic
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Created:
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30/Nov/16 4:51 PM
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Environment:
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">Any</p>
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filter
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Reporter:
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<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="paulBouche" id="email_paulBouche" href="http://jira.qos.ch/secure/ViewProfile.jspa?name=paulBouche" style="color:#3b73af;; color: #3b73af; text-decoration: none">Paul Bouche</a>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">In getTurboFilterChainDecision() while iterating over all Turbo Filters <tt>java.util.concurrent.CopyOnWriteArrayList.toArray()</tt> is called which produces a copy of the whole under lying ArrayList.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">If this happens for <em>every</em> log request a lot of unnecessary objects are created which also then need to be garbage collected. This is not at all "turbo"...</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The right implementation is in the code itself in a comment in line 58</p>
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<span class="code-comment" style="color: #808080">// <span class="code-keyword" style="color: #000091; color: #808080">for</span> (TurboFilter tf : <span class="code-keyword" style="color: #000091; color: #808080">this</span>) {</span>
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<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">There seems to me no sane reason to not use the commented line but create a copy of the underlying array list every time. The inherited class takes care of current writes by copying on every <em>write</em> hence there is no need to copy on every read.</p>
<p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">If only one turbo filter is configured this bug does not occur.</p>
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