Hi,
I've stumbled today* over a big speed difference for code execution with
G1 GC vs. parallel GC also in the latest JDK8 (1.8.0_111-b14). Maybe you
have interests to investigate this. You should be able to reproduce this
via:
# setup
git clone https://github.com/graphhopper/graphhopper
wget htt
Hello,
Since this is measuring a short workload after vom startup it might not be the
best benchmark, but then again throughput GC is expected to be faster than G1.
In the particular case however I guess you could tune G1 a bit to that
workload. Did you check the verbose GC logs, and how many CPU
Hi Bernd,
why do you think it is measuring a short workload? 'short' in which
terms? The overall test suite takes roughly 3 minutes but can be
increased easily via increasing the number of road routing queries. BTW:
with routing.mean we measure the latency of every road routing query, at
least I t
G1 has more expensive GC write barriers - if you have a reference heavy
heap with lots of mutation, it can add up. 20% more overhead for each
barrier is a number I've heard before.
On Monday, October 31, 2016, Peter wrote:
> Hi Bernd,
>
> why do you think it is measuring a short workload? 'shor
