On Fri, 17 Feb 2023 08:58:13 GMT, Xiaowei Lu <d...@openjdk.org> wrote:
> > After making sure that `intVal` is even, and before attempting a division > > by a power of 10, it might help to check if 5 divides `intVal` in the first > > place. If it doesn't, there no point in performing the division. > > It can be shown that 5 divides `intVal` if and only if it divides the > > `long` sum of all `int`s in the `mag` array of `intVal`. > > I didn't try out if this contributes to improve the overall performance, > > but it might be worth giving a try. > > Unfortunately, it seems this division by 5 doesn't give an obvious > performance improvement. Maybe previous lowest bit check has filtered some > cases. Thanks for trying out. ------------- PR: https://git.openjdk.org/jdk/pull/12509
