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Bugs for Performance problem
ID# Date Last Modified Type Status PHP Version OS Summary Assigned
54207
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2011-03-09 18:44 UTC 2012-10-08 08:40 UTC Doc Closed 5.3.5   autoload parameter for class_alias? reeze
60139
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2011-10-26 10:36 UTC 2011-11-02 06:31 UTC Bug Closed 5.4.0beta2   Anonymous functions create cycles not detected by the GC dmitry
63655
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2012-11-30 11:11 UTC 2016-08-06 09:39 UTC Req Closed 5.3.19   check type functions -> check type operators nikic
69440
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2015-04-13 22:39 UTC 2015-04-14 07:00 UTC Bug Closed 5.6.8RC1   Perfomance of function count() with array getted by references nikic
71102
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2015-12-12 14:05 UTC 2015-12-12 14:24 UTC Req Closed Irrelevant   Dead code elimination laruence
905
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1998-11-06 14:46 UTC 1998-11-06 14:49 UTC Bug Closed 3.0 Latest CVS (06/11/1998)   dancing  
3579
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2000-02-23 05:09 UTC 2000-03-01 15:07 UTC Bug Closed 4.0 Beta 4 Patch Level 1      
27275
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2004-02-16 07:38 UTC 2004-03-15 10:12 UTC Bug Closed 5CVS-2004-02-16 (4CVS) * Array->String cast takes serious performance hit, leaks like crazy  
30295
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2004-09-30 23:23 UTC 2006-01-01 21:54 UTC Bug Closed 5CVS, 4CVS (2005-06-20) * array_key_exists() makes a copy of the given array  
31332
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2004-12-29 12:30 UTC 2005-01-16 09:51 UTC Bug Closed 4CVS, 5CVS (2005-01-04) * unserialize() works terribly slow on huge strings compared to 4.3.9  
44069
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2008-02-07 13:39 UTC 2008-02-14 15:20 UTC Bug Closed 5.2.5 * Huge memory usage with concatenation using . instead of .= dmitry
47643
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2009-03-13 11:49 UTC 2010-11-01 18:18 UTC Bug Closed 5.*, 6CVS (2009-04-13) * array_diff() takes over 3000 times longer than php 5.2.4 felipe
50894
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2010-02-01 06:13 UTC 2015-04-06 15:42 UTC Req Closed 5.*, 6 * no-op cast triggers copy-on-write (ternary operator triggers copy too) dmitry
63699
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2012-12-05 15:52 UTC 2013-01-06 02:12 UTC Bug Closed 5.4.9 * Poor date()/etc performance [PATCH] lstrojny
75511
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2017-11-10 08:53 UTC 2017-11-13 01:10 UTC Bug Closed Irrelevant * fread not free unused buffer.  
2291
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1999-09-14 04:36 UTC 1999-09-25 11:59 UTC Bug Closed 4.0 Beta 2 AIX 4.3.2 Slow file upload  
19749
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2002-10-04 03:21 UTC 2004-04-21 14:04 UTC Bug Closed 4CVS-2002-10-04 All shouldn't mmap() files larger than memory_limit in _php_stream_passthru wez
40261
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2007-01-28 00:30 UTC 2007-03-20 07:14 UTC Bug Closed 5.2.0 All Extremely slow data handling due to memory fragmentation dmitry
65410
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2013-08-07 08:27 UTC 2015-04-15 14:00 UTC Req Closed 5.5.1 All Add call_func() syntax cmb
70497
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2015-09-15 04:01 UTC 2016-12-17 14:42 UTC Req Closed 5.6Git-2015-09-15 (Git) All Unnecessary HANDLE_BLOCK_INTERRUPTIONS leads to slowdown nikic
63666
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2012-12-02 00:50 UTC Not modified Bug Closed 5.4.9 any Poor date() performance [PATCH]  
2662
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1999-11-04 04:19 UTC 2000-03-17 05:35 UTC Bug Closed 4.0 Latest CVS (04/11/1999) Debian 2.0r3 Strange echo/printf perfomance  
1379
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1999-05-06 05:21 UTC 1999-05-06 11:19 UTC Bug Closed 3.0.5 debian Linux 2.0 (Kernel 2.0.36) PHP3 does not return full pages when databases are accessed  
66939
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2014-03-21 20:07 UTC 2016-12-17 15:29 UTC Bug Closed 5.4.26 Debian Wheezy memory leak when assigning big arrays of objects to variable while iterating nikic
45942
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2008-08-28 17:36 UTC 2008-09-03 21:05 UTC Bug Closed 5.2.6 Fedora Core 6 D_FILE_OFFSET_BITS=64 causes PHP to run at half speed  
1831
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1999-07-22 12:15 UTC 1999-08-20 12:09 UTC Bug Closed 4.0 Beta 1 FreeBSD 3.0 PHP4 as CGI parses itself  
2978
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1999-12-15 05:36 UTC 1999-12-26 11:16 UTC Bug Closed 4.0 Beta 3 FreeBSD 3.2-RELEASE very high load averages / cpu usage  
4796
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2000-06-03 19:11 UTC 2000-07-06 17:58 UTC Bug Closed 4.0.0 Release FreeBSD 4.0 WWW server runs on high loads all the time even with no requests at all.  
7747
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2000-11-10 10:42 UTC 2001-11-10 08:42 UTC Bug Closed 4.0.3pl1 FreeBSD 4.0-RELEASE Apache 1.3.1 after opening a socket and while reading from it php start growing CPU/MEM usag  
73807
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2016-12-23 12:52 UTC 2018-01-15 12:19 UTC Sec Bug Closed 5.6.29, 7.0,7.1 FreeBSD 9.4-11.0 Performance problem with processing post request over 2000000 chars stas
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