> On 26 Oct 2016, at 05:11, Claes Redestad <claes.redes...@oracle.com> wrote: > > Hi, > > does this commentary suffice? > > http://cr.openjdk.java.net/~redestad/8168640/webrev.02/ >
+1 > To answer Paul's question about the exact startup gain: > > 20 named classes observable with -Xlog:class+load (11 > additional anonymous show up in heap dumps), for example: > > java.lang.invoke.MethodType$ConcurrentWeakInternSet > java.lang.invoke.MethodType$ConcurrentWeakInternSet$WeakEntry > java.lang.invoke.MethodTypeForm > java.lang.invoke.VarHandle$1 > java.lang.invoke.VarHandle$AccessDescriptor > java.lang.invoke.VarHandle$AccessMode > java.lang.invoke.VarHandle$AccessType > java.lang.invoke.VarHandleGuards > java.lang.invoke.VarHandleInts$FieldInstanceReadOnly > java.lang.invoke.VarHandleInts$FieldInstanceReadWrite > java.lang.invoke.VarHandles > java.lang.invoke.VarHandle$TypesAndInvokers > > Not initializing this eagerly drops retained heap on a minimal > Hello World by ~17Kb, and a 3-10ms startup improvement > on similar programs (naturally varies a lot between systems > due to timing of when/if JIT compilations happen during early > execution). > Thanks. Do you observe that MethodHandleStatics.<clinit> can take a large proportion of the VH initialisation time? Paul.
