StackOverflow2013

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plurals

PO
primarykey
Id
15500421
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-03-19T13:08:46.397
FavoriteCount
0
LastActivityDate
2013-03-19T13:39:19.097
LastEditDate
2013-03-19T13:39:19.097
LastEditorUserId
1226894
OwnerUserId
1226894
ParentId
15500026
PostTypeId
2
Score
5
ViewCount
0
LastEditorDisplayName
text
Body
Yes 100% correct ... that is if you are still using PHP early version of <code>PHP</code> such as <code>PHP 5.1.2</code> to <code>PHP 5.2.2</code> in most resent stable version of <code>PHP</code> they are the same and <code>md5</code> run slightly faster in some versions <a href="http://3v4l.org/GDVgk" rel="nofollow">Here is a simple test in most PHP version</a> You also need to note that bench mark method is wrong and changing position affect the result ... This is how to get better result . <pre><code>set_time_limit(0); echo "<pre>"; function m1($total) { for($i = 0; $i < $total; $i ++) hash('md5', 'string'); } function m2($total) { for($i = 0; $i < $total; $i ++) md5('string'); } function m3($total) { for($i = 0; $i < $total; $i ++) hash('sha1', 'string'); } function m4($total) { for($i = 0; $i < $total; $i ++) sha1('string'); } function m5($total) { for($i = 0; $i < $total; $i ++) hash('md5', $i); } function m6($total) { for($i = 0; $i < $total; $i ++) md5($i); } function m7($total) { for($i = 0; $i < $total; $i ++) hash('sha1', $i); } function m8($total) { for($i = 0; $i < $total; $i ++) sha1($i); } $result = array( 'm1' => 0, 'm2' => 0, 'm3' => 0, 'm4' => 0, 'm5' => 0, 'm6' => 0, 'm7' => 0, 'm8' => 0 ); $total = 10000; for($i = 0; $i < 100; ++ $i) { foreach ( array_keys($result) as $key ) { $alpha = microtime(true); $key($total); $result[$key] += microtime(true) - $alpha; } } echo '<pre>'; echo "Single Run\n"; print_r($result); echo '</pre>'; </code></pre> Output <pre><code>Single Run Array ( [m1] => 0.58715152740479 <--- hash/md5/string [m2] => 0.41520881652832 <--- md5/string [m3] => 0.79592990875244 <--- hash/sha1/string [m4] => 0.61766123771667 <--- sha1/string [m5] => 0.67594528198242 <--- hash/md5/$i [m6] => 0.51757597923279 <--- md5/$i [m7] => 0.90692067146301 <--- hash/sha1/$i [m8] => 0.74792814254761 <--- sha1/$i ) </code></pre> <a href="http://codepad.viper-7.com/QxqQvG" rel="nofollow">Live Test</a> 
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POWhy is "hash('md5', 'string')" faster than "md5('string')"?
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USBaba
UserOwnerUserId
1. USBaba
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
2. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
3. VO
 singulars
 PostPostId
 PO
 UserUserId
 This table or related slice is empty.
 VoteTypeVoteTypeId
 VTUpMod
CommentsPostId
1. This table or related slice is empty.

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