[Issue 18114] dmd 2.078-beta1: regex performance regression

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18114

--- Comment #1 from Jon Degenhardt <jrdemail2000-dlang at yahoo.com> ---
Regex in the test: '[RD].*(ION[0-2])'
Compilation flags: dmd -release -O -boundscheck=off -inline

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