Index: java/org/apache/tomcat/util/threads/TaskQueue.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- java/org/apache/tomcat/util/threads/TaskQueue.java	(revision 75cec48b92d593b0beed19d3befedf86d497edfa)
+++ java/org/apache/tomcat/util/threads/TaskQueue.java	(date 1582049473504)
@@ -66,14 +66,16 @@
 
     @Override
     public boolean offer(Runnable o) {
-      //we can't do any checks
-        if (parent==null) return super.offer(o);
+        //we can't do any checks
+        if (parent == null) return super.offer(o);
+        // getPoolSize() is expensive call to AbstractQueuedSynchronizer acquire lock
+        final int poolSize = parent.getPoolSize();
         //we are maxed out on threads, simply queue the object
-        if (parent.getPoolSize() == parent.getMaximumPoolSize()) return super.offer(o);
+        if (poolSize == parent.getMaximumPoolSize()) return super.offer(o);
         //we have idle threads, just add it to the queue
-        if (parent.getSubmittedCount()<=(parent.getPoolSize())) return super.offer(o);
+        if (parent.getSubmittedCount() <= poolSize) return super.offer(o);
         //if we have less threads than maximum force creation of a new thread
-        if (parent.getPoolSize()<parent.getMaximumPoolSize()) return false;
+        if (poolSize < parent.getMaximumPoolSize()) return false;
         //if we reached here, we need to add it to the queue
         return super.offer(o);
     }