note 81751 added to function.md5-file

In response to using exec instead for performance (Nov 13 2007 post), It looks like the performance depends on the size of the file. See the results below using the same script from the original post. The first hash is with md5_file and the second is with openssl md5. With a 1MB file: Hash = df1555ec0c2d7fcad3a03770f9aa238a; time = 0.005006 Hash = df1555ec0c2d7fcad3a03770f9aa238a; time = 0.01498 With a 2MB file: Hash = 4387904830a4245a8ab767e5937d722c; time = 0.010393 Hash = 4387904830a4245a8ab767e5937d722c; time = 0.016691 With a 10MB file: Hash = b89f948e98f3a113dc13fdbd3bdb17ef; time = 0.241907 Hash = b89f948e98f3a113dc13fdbd3bdb17ef; time = 0.037597 Performance seems to change proportionally with the file size. Judging from the previous post's default file name (.mov) he/she was probably dealing with a large file. These are just quick tests and far from a perfect benchmark, but you might want to test your own files before assuming that the openssl solution is faster (ie, if working with small text files vs. movies, etc) ---- Server IP: 66.207.199.35 Probable Submitter: 206.191.21.204 ---- Manual Page -- http://www.php.net/manual/en/function.md5-file.php Edit -- https://master.php.net/note/edit/81751 Del: integrated -- https://master.php.net/note/delete/81751/integrated Del: useless -- https://master.php.net/note/delete/81751/useless Del: bad code -- https://master.php.net/note/delete/81751/bad+code Del: spam -- https://master.php.net/note/delete/81751/spam Del: non-english -- https://master.php.net/note/delete/81751/non-english Del: in docs -- https://master.php.net/note/delete/81751/in+docs Del: other reasons-- https://master.php.net/note/delete/81751 Reject -- https://master.php.net/note/reject/81751 Search -- https://master.php.net/manage/user-notes.php