RFR: Minor fixes, microoptimizations and cleanup

Tue Oct 6 14:56:23 UTC 2020

On Tue, 6 Oct 2020 11:47:12 GMT, Dalibor Topic <robilad at openjdk.org> wrote:

>> Fixed all comments
>
> @stokito  please send an email with your OCA data to dalibor.topic at oracle.com - my attempts to reach you seem to be not
> have been fruitful yet. Thanks!

Sorry guys, I was too busy (finished a project) and sent it only today. I resent a copy to dailbor. Will rebase now

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PR: https://git.openjdk.java.net/jol/pull/3