12 RFR(S) 8215205: javaVFrame much slower than vframeStream
mandy.chung at oracle.com
Mon Dec 17 23:01:58 UTC 2018
The change looks good.
It seems useful to add a microbenchmark in getting ACC so that we can
proactively compare the performance for relevant stackwalk change. With
JEP 230, the microbenchmarks are in the jdk test/micro directory and
it's very handy to run microbenchmarks. I'm not sure if one already
exists; if not, it's good to follow up with a new JBS and add one.
On 12/17/18 2:40 PM, dean.long at oracle.com wrote:
> This change allows a stackwalk to continue using the faster
> vframeStream iterator, but changing to a javaVFrame lazily as needed.
> It introduces a new API
> javaVFrame* vframeStreamCommon::asJavaVFrame()
> The first user of this API will be JDK-8214329, which is why this
> issue is a P3.
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