Hi, after a round of review comments I've now reworked this to do the transformations in the JNI layer rather than inside the VM, with similar - if not better - results.
Webrevs: http://cr.openjdk.java.net/~redestad/8171855/hotspot.03/ http://cr.openjdk.java.net/~redestad/8171855/jdk.03/ Testing: RBT run in progress, all runtime/modules tests pass locally Thanks! /Claes On 01/02/2017 07:27 PM, Claes Redestad wrote:
Hi, during jigsaw bootstrap, package names - represented in external form, "java.lang" - are transformed into VM internal form, "java/lang", before calling into the VM. This, however, can effectively be moved into the VM, which removes the need to generate a lot of short-lived strings during bootstrap and heat up various String.replace-related methods. This has a noticeable impact on startup metrics. Bug: https://bugs.openjdk.java.net/browse/JDK-8171855
