File checksum performance comparison

Important is that comparison is very dependant on specific implementation Apache Commons Codec , the specific purpose of use generate a secure token to be sent with API call.

If their speed for given context is several times faster than secure SHA-2 ones and security is not that much important they can be chosen though. When choosing cryptographic hash function everything is up to a context of usage and benchmark tests for this context is needed.

Automation Rhapsody Automate with enthusiasm. Blog About. Hash implementations For generating cryptographic hashes in Java there is Apache Commons Codec library which is very convenient. Speed performance In order to test the speed sample code is used: import java. UUID; import org. DigestUtils; import org. Hash 1 ms 2 ms 3 ms 4 ms 5 ms Average per 1M ms MD5 They are listed below and referenced in the table: Case 1 — 36 characters length string, UUID is cached Case 2 — 49 characters length string, UUID is cached and system time stamp is calculated each iteration Case 3 — 49 characters length string, new UUID is generated on each iteration and system time stamp is calculated each iteration Case 4 — 72 characters length string, UUID is cached Case 5 — 85 characters length string, UUID is cached and system time stamp is calculated each iteration Case 6 — 85 characters length string, new UUID is generated on each iteration and system time stamp is calculated each iteration All times below are per 1 calculations: Hash Case 1 ms Case 2 ms Case 3 ms Case 4 ms Case 5 ms Case 6 ms MD5 When the string is longer SHA is faster with 2.

MD5 is 7. The results are as follows. Eric is a systems guy. Eric is interested in building high-performance and scalable distributed systems and related technologies. The views or opinions expressed here are solely Eric's own and do not necessarily represent those of any third parties. On your system the bottleneck is disk, though increasingly this is moving up with the advance of SSDs. In that case the computational overhead becomes significant. You can quantify that on your system by avoid disk with something like:.

Note that sha1sum and md5sum use system specific instructions for significant speedups on systems congifured —with-openssl as is the default on arch, fedora, centos7, gentoo at least. I hope that you know that collisions exist in crc32, md5sum and even sha-0 checksums. But not yet for sha-1 which you actually used. Since I found these collision problems, I only use sha1sum and better sha, sha, sha or sha for my verifications when I can.

I will add a note in the post mentioning your comment. For many years I have found md5sum to consistently be faster than sha1sum, so I was very surprised when I read this article. I just tried it again on a file of size G and got this: md5sum real 10m Read, FileShare. StayOnTarget 9, 9 9 gold badges 43 43 silver badges 66 66 bronze badges. Tal Aloni Tal Aloni 1, 12 12 silver badges 13 13 bronze badges. Start ; p. ReadToEnd ; return output.

Split ' ' [0]. Substring 1. Christian Birkl Christian Birkl 4 4 silver badges 8 8 bronze badges. WOW - using md5sums. Ok - thanks to all of you - let me wrap this up: using a "native" exe to do the hashing took time from 6 Minutes to 10 Seconds which is huge.

Increasing the buffer was even faster - 1. Net, so I will go with this solution - thanks again. Community Bot 1 1 1 silver badge. So I thought, what about a standard 2TB harddrive. And the results were like this Bobrovsky Anders Anders 1 1 gold badge 6 6 silver badges 18 18 bronze badges. I dont get it. How can this test contradict the accepted answer from Anton Gogolev?

Can you add description of each field in your data? I know that I am late to party but performed test before actually implement the solution. ToLower ; Console. Now - current. Fabske Fabske 1, 16 16 silver badges 29 29 bronze badges. Pasi Savolainen Pasi Savolainen 2, 1 1 gold badge 21 21 silver badges 33 33 bronze badges. Yes - I will try to increase the buffer - like Anton Gogolev sugested.

I ran it through a "native" MD5. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.