RFR: 8260555: Change the default TIMEOUT_FACTOR from 4 to 1 [v3]

[David Holmes]

On Tue, 19 Aug 2025 03:31:55 GMT, SendaoYan <syan at openjdk.org> wrote:

>> It is also something that can be changed later, in a follow up fix.
>
> Take test test/hotspot/jtreg/compiler/arraycopy/stress/TestStressArrayCopy.java as example.
> If there is a bug in jvm with -Xcomp option which will cause this test run time outed. Before this PR, it will take `7200*10` seconds to run this test finish and report time outed failure. But after this PR, it will take `28800*10` seconds to run this test finish ang then report timed out failure. I think the `28800*10` senonds is too long and it's unacceptable.

> It is unclear to me if the author meant this to be 2.5 more than normal or 10 more than JTREG default, or a multiplier that seems to work. 

What matters is that the actual timeout, in seconds, remains unchanged, so please address this. Timeouts that are excessively long waste machine resources.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26749#discussion_r2284090715