It seems that large file support is possible without performance degradation on 32-bit platforms if PHP is compiled with Large File Support (LFS) and the curl extension is available.

Please see https://gist.github.com/bantu/886ac680b0aef5812f71 for the full report.

Also see https://github.com/bantu/php-large-files

@DeepDiver1975 @karlitschek @PVince81 @danimo