YourKit, LLC宣布YourKit Java Profiler 5.5 版本發布..YourKit Java Profiler是一個目前很受歡迎的Java Profiler（Java調優器）.可以用來分析和監控你的應用程序的性能, 從而進行更好地調優.這次YourKit, LLC發布的是YourKit Java Profiler 5.5 版本.官方提到的新特性包括:New and improved platform support- Mac OS X on Intel is supported- IBM Java 5.0 supported. Important! IBM Java 5.0 Service Release 1 (SR1) or newer is required. Initial IBM Java 5.0 release is not supported because it contains critical bugs in JVMTI implementation.- BEA JRockit 5 support improvements. Read about known issuesTelemetry- Telemetry for Java 1.3 and 1.4 is supported as well- New tab 'CPU and Memory'- Optimization: telemetry information requires less memory in UICPU profiling- New profiling mode that provides both method CPU times and invocation counts, but does not monitor internals of methods from core library classes (java.*, javax.*, com.sun.*, sun.*). The benefit is in much smaller overhead than when all methods are monitored.- In the mode where only CPU times are recorded, accuracy was improved on Linux, Mac OS X and Solaris- Increased accuracy of CPU times and invocation count measuring mode on Windows and Solaris. In particular, this improves profiling of short running methods.- Reduced overhead when method invocation counts are recordedMemory profiling- New feature: now it is possible to import memory snapshots in HPROF binary format. Use 'File | Import HPROF Snapshot...' action. Such snapshots are created:*Automatically by JVM if application fails with java.lang.OutOfMemoryError. To switch this behaviour on, -XX:+HeapDumpOnOutOfMemoryError JVM option should be specified. This option is supported in Java 6 'Mustang' JVM, and will be backported to Java 5.0 update 7 and Java 1.4.2_12.*Explicitly connecting via jmap utility to any running Sun JVM - no need for extra configuration (works in Java 6 'Mustang', and, possibly not very reliable, on Solaris with Java 1.4.2_09 and newer, and Linux with Java 5.0).*By JVM's built-in HPROF profiler (not very useful though). Please read more in the bundled Help.- Reduced overhead of object allocation recordingOther improvements- Profiler UI can run with Java 6 'Mustang.'