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For virtually everybody even 500% slower would be acceptable. 1% is 10 second, one-time cost, which is objectively a fool's bargain.

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Why am I getting downvoted? I sincerely wonder what is so objectionable in my comment. Most uses of 7-zip are one-off events that last around a minute long. Most users aren't decompressing terabyte-range files. It makes no fracking difference to users if they have to wait 5 minutes or 1 minute. But it makes a difference if they receive 7z archive and get their bank account cleaned because the author prematurely optimized his program on a 20 year old compiler. If there was ever a reasonable situation where security flags could be disable then client-side decompression utilities aren't one. Anyone who needs that 5% performance improvement can compile the library themselves. This is what is wrong with this industry.

Consider that it was misplaced to suggest a 500% performance drop. It's used to extract large archives, backups, videos, documents. Folks don't want it to take half an hour instead of a few minutes.

Thanks for replying, this explains things. I guess I extrapolated from my needs too much, I didn't consider users who do daily 10+ GB compressed backups.

I still wonder if there's an ethical dilemma that lies underneath this - is it fair to prioritize needs of users who use your tool in a different way (for backup jobs) over users that use your tool only occasionally, perhaps not even out of their own initiative (they were sent 7z file from a ostensibly trusted source).

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