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https://issues.apache.org/jira/browse/DERBY-6841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14995412#comment-14995412
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Xavion commented on DERBY-6841:
-------------------------------
I've just searched the codebase and "SecurityManager" was found zero times. In
fact, I didn't even know it existed until you just told me about it :-).
I think part of this problem could be due to the state that v10.12.1.1 leaves
the databases in upon disconnection. If I've just run the above tests using
v10.12.1.1 and then switch back to v10.11.1.1, the connection times are similar
to those of v10.12.1.1 initially. However, when I connect via v10.11.1.1 on
subsequent occasions (after first disconnecting), said times are back to normal.
> Derby v10.12.1.1 is horribly slow compared to v10.11.1.1 in embedded mode
> -------------------------------------------------------------------------
>
> Key: DERBY-6841
> URL: https://issues.apache.org/jira/browse/DERBY-6841
> Project: Derby
> Issue Type: Bug
> Components: JDBC, SQL
> Affects Versions: 10.12.1.1
> Environment: OS: Windows, OS X, Linux
> CPU: Quad-Core Intel i5
> App: Swing, multi-threaded
> Reporter: Xavion
> Fix For: 10.11.1.1
>
>
> It takes much longer to open, read, and close embedded databases using
> v10.12.1.1 than it did with v10.11.1.1. What ever changes you guys made over
> the last year and a bit have definitely been for the worse.
> Below are the results of the repetition tests I've just run on the same
> computer with the same databases. Let me know if you need to know about the
> sizes of the databases and/or the file type they contain.
> Connecting with v10.11.1.1:
> Database opened in 0.82 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.88 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.77 seconds.
> Database opened in 0.96 seconds.
> Database opened in 0.74 seconds.
> Connecting with v10.12.1.1:
> Database opened in 1.98 seconds.
> Database opened in 2.07 seconds.
> Database opened in 1.97 seconds.
> Database opened in 2.01 seconds.
> Database opened in 2.01 seconds.
> Database opened in 2.00 seconds.
> Database opened in 2.03 seconds.
> Reading with v10.11.1.1:
> Database processed in 6.17 seconds.
> Database processed in 4.00 seconds.
> Database processed in 3.67 seconds.
> Database processed in 3.66 seconds.
> Database processed in 3.78 seconds.
> Database processed in 3.69 seconds.
> Database processed in 3.74 seconds.
> Reading with v10.12.1.1:
> Database processed in 7.29 seconds.
> Database processed in 4.54 seconds.
> Database processed in 4.88 seconds.
> Database processed in 4.65 seconds.
> Database processed in 4.34 seconds.
> Database processed in 4.35 seconds.
> Database processed in 4.50 seconds.
> Disconnecting with v10.11.1.1:
> Database closed in 0.11 seconds.
> Database closed in 0.13 seconds.
> Database closed in 0.15 seconds.
> Database closed in 0.14 seconds.
> Database closed in 0.10 seconds.
> Database closed in 0.13 seconds.
> Database closed in 0.14 seconds.
> Disconnecting with v10.12.1.1:
> Database closed in 0.74 seconds.
> Database closed in 0.87 seconds.
> Database closed in 0.76 seconds.
> Database closed in 0.87 seconds.
> Database closed in 0.85 seconds.
> Database closed in 0.69 seconds.
> Database closed in 0.84 seconds.
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