Devel::SawAmpersand, and no there's no way to turn them off that I know of. Though I think the effect of these is greatly overrated (unless perhaps you are working with huge strings).

5.10.0 may have support for building perl with special copy-on-write handling. I think benchmarks are showing no real gain using this, but if you are seeing a real hurt from $&, your case may be an exception.

Update: seems you can put BEGIN { $::{"&"}=*a } in and nuke support for $& (and do same for $' and $`). That's going to break whatever uses $&, though. Not to mention voiding your perl warranty.

In reply to Re: detecting $& usage by ysth
in thread detecting $& usage by greatdane

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