Am 09.02.2012, 10:06 Uhr, schrieb Nicolae Mihalache <xproma...@gmail.com>:
Hello,
I'm a complete newbie in D and trying to compare with Java. I
implemented a simple test for measuring the throughput in message
passing between threads. I see that Java can pass about 4mil
messages/sec while D only achieves 1mil/sec. I thought that D should
be faster.
The messages are simply integers (which are converted to Integer in
Java).
The two programs are attached. I tried compiling the D version with
both dmd and gdc and various optimization flags.
mache
I cannot give you an explanation, just want to say that a message in
std.concurrency is also using a wrapper (a 'Variant') + a type field
(standard, priority, linkDead). So you effectively have no optimization
for int, but the same situation as in Java.
The second thing I notice is that std.concurrency uses a double linked
list implementation, while you use an array in the Java version, which
results in no additional node allocations.
