your results. If so, try to force a GC between runs (`-gc true`) but watch out for the caveats.
    * Add `-prof perf` or `-prof perfasm` (both only available on Linux, see Disassembling below) to see hotspots.
    * Add `-prof async` to see hotspots.
* Have your benchmarks peer-reviewed.

### Don't

* Blindly believe the numbers that your microbenchmark produces but verify them by measuring e.g. with `-prof perfasm`.

    if (reference == null) {
      throw new NullPointerException(Platform.lenientFormat(errorMessageTemplate, p1, p2, p3, p4));
    }
    return reference;
  }

  /*
   * All recent hotspots (as of 2009) *really* like to have the natural code
   *
   * if (guardExpression) {
   *    throw new BadException(messageExpression);
   * }
   *

    if (reference == null) {
      throw new NullPointerException(Platform.lenientFormat(errorMessageTemplate, p1, p2, p3, p4));
    }
    return reference;
  }

  /*
   * All recent hotspots (as of 2009) *really* like to have the natural code
   *
   * if (guardExpression) {
   *    throw new BadException(messageExpression);
   * }
   *

                    + "/[module]/[classifier]/jdk/hotspot/normal/adoptium";
            } else {
                // current pattern since JDK 9
                artifactPattern = "jdk-"
                    + jdk.getBaseVersion()
                    + "+"
                    + jdk.getBuild()
                    + "/[module]/[classifier]/jdk/hotspot/normal/adoptium";
            }

        if (vendor.equals(VENDOR_ADOPTIUM)) {
            final String module = isMac(platform) ? "mac" : platform;
            return "/jdk-" + version + "/" + module + "/${arch}/jdk/hotspot/normal/adoptium";
        } else if (vendor.equals(VENDOR_OPENJDK)) {
            final String effectivePlatform = isMac(platform) ? "osx" : platform;
            final boolean isOld = version.equals(OPENJDK_VERSION_OLD);

        @SuppressWarnings("unused")
        private final String field = "test";
    }

    private long getObjectSize(Object value) {
        System.setProperty("java.vm.name", "Java HotSpot(TM) ");
        return ObjectSizeCalculator.getObjectSize(value);
    }

Welcome to


      ____              __
     / __/__  ___ _____/ /__
    _\ \/ _ \/ _ `/ __/  '_/
   /___/ .__/\_,_/_/ /_/\_\   version 2.1.0.2.6.0.0-598
      /_/

Using Scala version 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_112)
Type in expressions to have them evaluated.
Type :help for more information.

scala>
```

       * fastest (more than twice as fast as the Java implementation, vs ~1.5x with non-final static
       * fields, on x86_32) under the Hotspot server compiler. The reason is obviously that the
       * non-final fields need to be reloaded inside the loop.
       *
       * And, no, defining (final or not) local variables out of the loop still isn't as good

     * can take 1-10 seconds to find colliding objects. Mocking frameworks that
     * can do magic to mock static method calls still can't do so for a system
     * class, so we need the indirection. In production, Hotspot should still
     * recognize that the call is 1-morphic and should still be willing to
     * inline it if necessary.
     */
    int identityHashCode(Object object) {
      return System.identityHashCode(object);

     * can take 1-10 seconds to find colliding objects. Mocking frameworks that
     * can do magic to mock static method calls still can't do so for a system
     * class, so we need the indirection. In production, Hotspot should still
     * recognize that the call is 1-morphic and should still be willing to
     * inline it if necessary.
     */
    int identityHashCode(Object object) {
      return System.identityHashCode(object);