Performance test for https://github.com/php/php-src/pull/642

json_change_perf.php

<?php

$data = array_fill(0, 1000, 1.0);
$iterations = 10000;

$m = microtime(true);
while ($iterations-- > 0) {
	json_encode($data);
}
echo "Elapsed time: ", (microtime(true) - $m), "\n";
echo "Peak memory (real = false): ", memory_get_peak_usage(false), "\n";
echo "Peak memory (real = true): ", memory_get_peak_usage(true), "\n";

output.txt

vagrant@jrbasso:~/shared/php-src$ git log -3
commit 56b4ba5f8887bacc14cc2526f0745ba034897159
Author: Juan Basso <jrbasso@gmail.com>
Date:   Sun Apr 13 19:45:54 2014 -0400

    Replacing use of strstr to strchr for performance reasons

    Thanks to @smalyshev for the tip.

commit 4c263b6e78d5aa9761b5d596c2a8a15335c9b0aa
Author: Juan Basso <jrbasso@gmail.com>
Date:   Sat Mar 29 19:41:48 2014 -0400

    Fixed bug #50224 where float without decimals were converted to integer

commit 0cdc57b3cf6b63466cf6c612ce7ef4598236926d
Merge: 2bb7f3a 1bca3ec
Author: Anatol Belski <ab@php.net>
Date:   Fri Apr 18 16:09:02 2014 +0200

    Merge branch 'PHP-5.6'

    * PHP-5.6:
      updated libs versions
vagrant@jrbasso:~/shared/php-src$ make

Build complete.
Don't forget to run 'make test'.

vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 3.5737547874451
Peak memory (real = false): 328936
Peak memory (real = true): 524288
vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 3.3423249721527
Peak memory (real = false): 328936
Peak memory (real = true): 524288
vagrant@jrbasso:~/shared/php-src$ git checkout 0cdc57b3cf6b63466cf6c612ce7ef4598236926d
Note: checking out '0cdc57b3cf6b63466cf6c612ce7ef4598236926d'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by performing another checkout.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -b with the checkout command again. Example:

  git checkout -b new_branch_name

HEAD is now at 0cdc57b... Merge branch 'PHP-5.6'
vagrant@jrbasso:~/shared/php-src$ make
/bin/bash /home/vagrant/shared/php-src/libtool --silent --preserve-dup-deps --mode=compile cc  -Iext/json/ -I/home/vagrant/shared/php-src/ext/json/ -DPHP_ATOM_INC -I/home/vagrant/shared/php-src/include -I/home/vagrant/shared/php-src/main -I/home/vagrant/shared/php-src -I/home/vagrant/shared/php-src/ext/date/lib -I/home/vagrant/shared/php-src/ext/ereg/regex -I/usr/include/libxml2 -I/home/vagrant/shared/php-src/ext/sqlite3/libsqlite -I/home/vagrant/shared/php-src/TSRM -I/home/vagrant/shared/php-src/Zend    -I/usr/include -g -O2 -fvisibility=hidden  -c /home/vagrant/shared/php-src/ext/json/json.c -o ext/json/json.lo
/home/vagrant/shared/php-src/ext/json/json.c: In function 'json_escape_string':
/home/vagrant/shared/php-src/ext/json/json.c:424:6: warning: unknown conversion type character 'k' in format [-Wformat]
/home/vagrant/shared/php-src/ext/json/json.c: In function 'php_json_encode':
/home/vagrant/shared/php-src/ext/json/json.c:632:6: warning: unknown conversion type character 'k' in format [-Wformat]
/bin/bash /home/vagrant/shared/php-src/libtool --silent --preserve-dup-deps --mode=link cc -export-dynamic -I/usr/include -g -O2 -fvisibility=hidden  -L/usr/lib/x86_64-linux-gnu  -R /usr/lib/x86_64-linux-gnu ext/date/php_date.lo ext/date/lib/astro.lo ext/date/lib/dow.lo ext/date/lib/parse_date.lo ext/date/lib/parse_tz.lo ext/date/lib/timelib.lo ext/date/lib/tm2unixtime.lo ext/date/lib/unixtime2tm.lo ext/date/lib/parse_iso_intervals.lo ext/date/lib/interval.lo ext/ereg/ereg.lo ext/ereg/regex/regcomp.lo ext/ereg/regex/regexec.lo ext/ereg/regex/regerror.lo ext/ereg/regex/regfree.lo ext/libxml/libxml.lo ext/pcre/pcrelib/pcre_chartables.lo ext/pcre/pcrelib/pcre_ucd.lo ext/pcre/pcrelib/pcre_compile.lo ext/pcre/pcrelib/pcre_config.lo ext/pcre/pcrelib/pcre_exec.lo ext/pcre/pcrelib/pcre_fullinfo.lo ext/pcre/pcrelib/pcre_get.lo ext/pcre/pcrelib/pcre_globals.lo ext/pcre/pcrelib/pcre_maketables.lo ext/pcre/pcrelib/pcre_newline.lo ext/pcre/pcrelib/pcre_ord2utf8.lo ext/pcre/pcrelib/pcre_refcount.lo ext/pcre/pcrelib/pcre_study.lo ext/pcre/pcrelib/pcre_tables.lo ext/pcre/pcrelib/pcre_valid_utf8.lo ext/pcre/pcrelib/pcre_version.lo ext/pcre/pcrelib/pcre_xclass.lo ext/pcre/php_pcre.lo ext/sqlite3/sqlite3.lo ext/sqlite3/libsqlite/sqlite3.lo ext/ctype/ctype.lo ext/dom/php_dom.lo ext/dom/attr.lo ext/dom/document.lo ext/dom/domerrorhandler.lo ext/dom/domstringlist.lo ext/dom/domexception.lo ext/dom/namelist.lo ext/dom/processinginstruction.lo ext/dom/cdatasection.lo ext/dom/documentfragment.lo ext/dom/domimplementation.lo ext/dom/element.lo ext/dom/node.lo ext/dom/string_extend.lo ext/dom/characterdata.lo ext/dom/documenttype.lo ext/dom/domimplementationlist.lo ext/dom/entity.lo ext/dom/nodelist.lo ext/dom/text.lo ext/dom/comment.lo ext/dom/domconfiguration.lo ext/dom/domimplementationsource.lo ext/dom/entityreference.lo ext/dom/notation.lo ext/dom/xpath.lo ext/dom/dom_iterators.lo ext/dom/typeinfo.lo ext/dom/domerror.lo ext/dom/domlocator.lo ext/dom/namednodemap.lo ext/dom/userdatahandler.lo ext/fileinfo/fileinfo.lo ext/fileinfo/libmagic/apprentice.lo ext/fileinfo/libmagic/apptype.lo ext/fileinfo/libmagic/ascmagic.lo ext/fileinfo/libmagic/cdf.lo ext/fileinfo/libmagic/cdf_time.lo ext/fileinfo/libmagic/compress.lo ext/fileinfo/libmagic/encoding.lo ext/fileinfo/libmagic/fsmagic.lo ext/fileinfo/libmagic/funcs.lo ext/fileinfo/libmagic/is_tar.lo ext/fileinfo/libmagic/magic.lo ext/fileinfo/libmagic/print.lo ext/fileinfo/libmagic/readcdf.lo ext/fileinfo/libmagic/readelf.lo ext/fileinfo/libmagic/softmagic.lo ext/filter/filter.lo ext/filter/sanitizing_filters.lo ext/filter/logical_filters.lo ext/filter/callback_filter.lo ext/hash/hash.lo ext/hash/hash_md.lo ext/hash/hash_sha.lo ext/hash/hash_ripemd.lo ext/hash/hash_haval.lo ext/hash/hash_tiger.lo ext/hash/hash_gost.lo ext/hash/hash_snefru.lo ext/hash/hash_whirlpool.lo ext/hash/hash_adler32.lo ext/hash/hash_crc32.lo ext/hash/hash_fnv.lo ext/hash/hash_joaat.lo ext/iconv/iconv.lo ext/json/json.lo ext/json/utf8_decode.lo ext/json/JSON_parser.lo ext/pdo/pdo.lo ext/pdo/pdo_dbh.lo ext/pdo/pdo_stmt.lo ext/pdo/pdo_sql_parser.lo ext/pdo/pdo_sqlstate.lo ext/pdo_sqlite/pdo_sqlite.lo ext/pdo_sqlite/sqlite_driver.lo ext/pdo_sqlite/sqlite_statement.lo ext/phar/util.lo ext/phar/tar.lo ext/phar/zip.lo ext/phar/stream.lo ext/phar/func_interceptors.lo ext/phar/dirstream.lo ext/phar/phar.lo ext/phar/phar_object.lo ext/phar/phar_path_check.lo ext/posix/posix.lo ext/reflection/php_reflection.lo ext/session/mod_user_class.lo ext/session/session.lo ext/session/mod_files.lo ext/session/mod_mm.lo ext/session/mod_user.lo ext/simplexml/simplexml.lo ext/simplexml/sxe.lo ext/spl/php_spl.lo ext/spl/spl_functions.lo ext/spl/spl_engine.lo ext/spl/spl_iterators.lo ext/spl/spl_array.lo ext/spl/spl_directory.lo ext/spl/spl_exceptions.lo ext/spl/spl_observer.lo ext/spl/spl_dllist.lo ext/spl/spl_heap.lo ext/spl/spl_fixedarray.lo ext/standard/crypt_freesec.lo ext/standard/crypt_blowfish.lo ext/standard/crypt_sha512.lo ext/standard/crypt_sha256.lo ext/standard/php_crypt_r.lo ext/standard/array.lo ext/standard/base64.lo ext/standard/basic_functions.lo ext/standard/browscap.lo ext/standard/crc32.lo ext/standard/crypt.lo ext/standard/cyr_convert.lo ext/standard/datetime.lo ext/standard/dir.lo ext/standard/dl.lo ext/standard/dns.lo ext/standard/exec.lo ext/standard/file.lo ext/standard/filestat.lo ext/standard/flock_compat.lo ext/standard/formatted_print.lo ext/standard/fsock.lo ext/standard/head.lo ext/standard/html.lo ext/standard/image.lo ext/standard/info.lo ext/standard/iptc.lo ext/standard/lcg.lo ext/standard/link.lo ext/standard/mail.lo ext/standard/math.lo ext/standard/md5.lo ext/standard/metaphone.lo ext/standard/microtime.lo ext/standard/pack.lo ext/standard/pageinfo.lo ext/standard/quot_print.lo ext/standard/rand.lo ext/standard/soundex.lo ext/standard/string.lo ext/standard/scanf.lo ext/standard/syslog.lo ext/standard/type.lo ext/standard/uniqid.lo ext/standard/url.lo ext/standard/var.lo ext/standard/versioning.lo ext/standard/assert.lo ext/standard/strnatcmp.lo ext/standard/levenshtein.lo ext/standard/incomplete_class.lo ext/standard/url_scanner_ex.lo ext/standard/ftp_fopen_wrapper.lo ext/standard/http_fopen_wrapper.lo ext/standard/php_fopen_wrapper.lo ext/standard/credits.lo ext/standard/css.lo ext/standard/var_unserializer.lo ext/standard/ftok.lo ext/standard/sha1.lo ext/standard/user_filters.lo ext/standard/uuencode.lo ext/standard/filters.lo ext/standard/proc_open.lo ext/standard/streamsfuncs.lo ext/standard/http.lo ext/standard/password.lo ext/tokenizer/tokenizer.lo ext/tokenizer/tokenizer_data.lo ext/xml/xml.lo ext/xml/compat.lo ext/xmlreader/php_xmlreader.lo ext/xmlwriter/php_xmlwriter.lo TSRM/TSRM.lo TSRM/tsrm_strtok_r.lo main/main.lo main/snprintf.lo main/spprintf.lo main/php_sprintf.lo main/fopen_wrappers.lo main/alloca.lo main/php_scandir.lo main/php_ini.lo main/SAPI.lo main/rfc1867.lo main/php_content_types.lo main/strlcpy.lo main/strlcat.lo main/mergesort.lo main/reentrancy.lo main/php_variables.lo main/php_ticks.lo main/network.lo main/php_open_temporary_file.lo main/output.lo main/getopt.lo main/streams/streams.lo main/streams/cast.lo main/streams/memory.lo main/streams/filter.lo main/streams/plain_wrapper.lo main/streams/userspace.lo main/streams/transports.lo main/streams/xp_socket.lo main/streams/mmap.lo main/streams/glob_wrapper.lo Zend/zend_language_parser.lo Zend/zend_language_scanner.lo Zend/zend_ini_parser.lo Zend/zend_ini_scanner.lo Zend/zend_alloc.lo Zend/zend_compile.lo Zend/zend_constants.lo Zend/zend_dynamic_array.lo Zend/zend_dtrace.lo Zend/zend_execute_API.lo Zend/zend_highlight.lo Zend/zend_llist.lo Zend/zend_vm_opcodes.lo Zend/zend_opcode.lo Zend/zend_operators.lo Zend/zend_ptr_stack.lo Zend/zend_stack.lo Zend/zend_variables.lo Zend/zend.lo Zend/zend_API.lo Zend/zend_extensions.lo Zend/zend_hash.lo Zend/zend_list.lo Zend/zend_indent.lo Zend/zend_builtin_functions.lo Zend/zend_sprintf.lo Zend/zend_ini.lo Zend/zend_qsort.lo Zend/zend_multibyte.lo Zend/zend_ts_hash.lo Zend/zend_stream.lo Zend/zend_iterators.lo Zend/zend_interfaces.lo Zend/zend_exceptions.lo Zend/zend_strtod.lo Zend/zend_gc.lo Zend/zend_closures.lo Zend/zend_float.lo Zend/zend_string.lo Zend/zend_signal.lo Zend/zend_generators.lo Zend/zend_virtual_cwd.lo Zend/zend_ast.lo Zend/zend_objects.lo Zend/zend_object_handlers.lo Zend/zend_objects_API.lo Zend/zend_default_classes.lo Zend/zend_execute.lo main/internal_functions_cli.lo sapi/cli/php_cli.lo sapi/cli/php_http_parser.lo sapi/cli/php_cli_server.lo sapi/cli/ps_title.lo sapi/cli/php_cli_process_title.lo -lcrypt -lresolv -lcrypt -lrt -lrt -lm -ldl -lnsl -lxml2 -lxml2 -lxml2 -lcrypt -lxml2 -lxml2 -lxml2 -lcrypt  -o sapi/cli/php
/bin/bash /home/vagrant/shared/php-src/libtool --silent --preserve-dup-deps --mode=link cc -export-dynamic -I/usr/include -g -O2 -fvisibility=hidden  -L/usr/lib/x86_64-linux-gnu  -R /usr/lib/x86_64-linux-gnu ext/date/php_date.lo ext/date/lib/astro.lo ext/date/lib/dow.lo ext/date/lib/parse_date.lo ext/date/lib/parse_tz.lo ext/date/lib/timelib.lo ext/date/lib/tm2unixtime.lo ext/date/lib/unixtime2tm.lo ext/date/lib/parse_iso_intervals.lo ext/date/lib/interval.lo ext/ereg/ereg.lo ext/ereg/regex/regcomp.lo ext/ereg/regex/regexec.lo ext/ereg/regex/regerror.lo ext/ereg/regex/regfree.lo ext/libxml/libxml.lo ext/pcre/pcrelib/pcre_chartables.lo ext/pcre/pcrelib/pcre_ucd.lo ext/pcre/pcrelib/pcre_compile.lo ext/pcre/pcrelib/pcre_config.lo ext/pcre/pcrelib/pcre_exec.lo ext/pcre/pcrelib/pcre_fullinfo.lo ext/pcre/pcrelib/pcre_get.lo ext/pcre/pcrelib/pcre_globals.lo ext/pcre/pcrelib/pcre_maketables.lo ext/pcre/pcrelib/pcre_newline.lo ext/pcre/pcrelib/pcre_ord2utf8.lo ext/pcre/pcrelib/pcre_refcount.lo ext/pcre/pcrelib/pcre_study.lo ext/pcre/pcrelib/pcre_tables.lo ext/pcre/pcrelib/pcre_valid_utf8.lo ext/pcre/pcrelib/pcre_version.lo ext/pcre/pcrelib/pcre_xclass.lo ext/pcre/php_pcre.lo ext/sqlite3/sqlite3.lo ext/sqlite3/libsqlite/sqlite3.lo ext/ctype/ctype.lo ext/dom/php_dom.lo ext/dom/attr.lo ext/dom/document.lo ext/dom/domerrorhandler.lo ext/dom/domstringlist.lo ext/dom/domexception.lo ext/dom/namelist.lo ext/dom/processinginstruction.lo ext/dom/cdatasection.lo ext/dom/documentfragment.lo ext/dom/domimplementation.lo ext/dom/element.lo ext/dom/node.lo ext/dom/string_extend.lo ext/dom/characterdata.lo ext/dom/documenttype.lo ext/dom/domimplementationlist.lo ext/dom/entity.lo ext/dom/nodelist.lo ext/dom/text.lo ext/dom/comment.lo ext/dom/domconfiguration.lo ext/dom/domimplementationsource.lo ext/dom/entityreference.lo ext/dom/notation.lo ext/dom/xpath.lo ext/dom/dom_iterators.lo ext/dom/typeinfo.lo ext/dom/domerror.lo ext/dom/domlocator.lo ext/dom/namednodemap.lo ext/dom/userdatahandler.lo ext/fileinfo/fileinfo.lo ext/fileinfo/libmagic/apprentice.lo ext/fileinfo/libmagic/apptype.lo ext/fileinfo/libmagic/ascmagic.lo ext/fileinfo/libmagic/cdf.lo ext/fileinfo/libmagic/cdf_time.lo ext/fileinfo/libmagic/compress.lo ext/fileinfo/libmagic/encoding.lo ext/fileinfo/libmagic/fsmagic.lo ext/fileinfo/libmagic/funcs.lo ext/fileinfo/libmagic/is_tar.lo ext/fileinfo/libmagic/magic.lo ext/fileinfo/libmagic/print.lo ext/fileinfo/libmagic/readcdf.lo ext/fileinfo/libmagic/readelf.lo ext/fileinfo/libmagic/softmagic.lo ext/filter/filter.lo ext/filter/sanitizing_filters.lo ext/filter/logical_filters.lo ext/filter/callback_filter.lo ext/hash/hash.lo ext/hash/hash_md.lo ext/hash/hash_sha.lo ext/hash/hash_ripemd.lo ext/hash/hash_haval.lo ext/hash/hash_tiger.lo ext/hash/hash_gost.lo ext/hash/hash_snefru.lo ext/hash/hash_whirlpool.lo ext/hash/hash_adler32.lo ext/hash/hash_crc32.lo ext/hash/hash_fnv.lo ext/hash/hash_joaat.lo ext/iconv/iconv.lo ext/json/json.lo ext/json/utf8_decode.lo ext/json/JSON_parser.lo ext/pdo/pdo.lo ext/pdo/pdo_dbh.lo ext/pdo/pdo_stmt.lo ext/pdo/pdo_sql_parser.lo ext/pdo/pdo_sqlstate.lo ext/pdo_sqlite/pdo_sqlite.lo ext/pdo_sqlite/sqlite_driver.lo ext/pdo_sqlite/sqlite_statement.lo ext/phar/util.lo ext/phar/tar.lo ext/phar/zip.lo ext/phar/stream.lo ext/phar/func_interceptors.lo ext/phar/dirstream.lo ext/phar/phar.lo ext/phar/phar_object.lo ext/phar/phar_path_check.lo ext/posix/posix.lo ext/reflection/php_reflection.lo ext/session/mod_user_class.lo ext/session/session.lo ext/session/mod_files.lo ext/session/mod_mm.lo ext/session/mod_user.lo ext/simplexml/simplexml.lo ext/simplexml/sxe.lo ext/spl/php_spl.lo ext/spl/spl_functions.lo ext/spl/spl_engine.lo ext/spl/spl_iterators.lo ext/spl/spl_array.lo ext/spl/spl_directory.lo ext/spl/spl_exceptions.lo ext/spl/spl_observer.lo ext/spl/spl_dllist.lo ext/spl/spl_heap.lo ext/spl/spl_fixedarray.lo ext/standard/crypt_freesec.lo ext/standard/crypt_blowfish.lo ext/standard/crypt_sha512.lo ext/standard/crypt_sha256.lo ext/standard/php_crypt_r.lo ext/standard/array.lo ext/standard/base64.lo ext/standard/basic_functions.lo ext/standard/browscap.lo ext/standard/crc32.lo ext/standard/crypt.lo ext/standard/cyr_convert.lo ext/standard/datetime.lo ext/standard/dir.lo ext/standard/dl.lo ext/standard/dns.lo ext/standard/exec.lo ext/standard/file.lo ext/standard/filestat.lo ext/standard/flock_compat.lo ext/standard/formatted_print.lo ext/standard/fsock.lo ext/standard/head.lo ext/standard/html.lo ext/standard/image.lo ext/standard/info.lo ext/standard/iptc.lo ext/standard/lcg.lo ext/standard/link.lo ext/standard/mail.lo ext/standard/math.lo ext/standard/md5.lo ext/standard/metaphone.lo ext/standard/microtime.lo ext/standard/pack.lo ext/standard/pageinfo.lo ext/standard/quot_print.lo ext/standard/rand.lo ext/standard/soundex.lo ext/standard/string.lo ext/standard/scanf.lo ext/standard/syslog.lo ext/standard/type.lo ext/standard/uniqid.lo ext/standard/url.lo ext/standard/var.lo ext/standard/versioning.lo ext/standard/assert.lo ext/standard/strnatcmp.lo ext/standard/levenshtein.lo ext/standard/incomplete_class.lo ext/standard/url_scanner_ex.lo ext/standard/ftp_fopen_wrapper.lo ext/standard/http_fopen_wrapper.lo ext/standard/php_fopen_wrapper.lo ext/standard/credits.lo ext/standard/css.lo ext/standard/var_unserializer.lo ext/standard/ftok.lo ext/standard/sha1.lo ext/standard/user_filters.lo ext/standard/uuencode.lo ext/standard/filters.lo ext/standard/proc_open.lo ext/standard/streamsfuncs.lo ext/standard/http.lo ext/standard/password.lo ext/tokenizer/tokenizer.lo ext/tokenizer/tokenizer_data.lo ext/xml/xml.lo ext/xml/compat.lo ext/xmlreader/php_xmlreader.lo ext/xmlwriter/php_xmlwriter.lo TSRM/TSRM.lo TSRM/tsrm_strtok_r.lo main/main.lo main/snprintf.lo main/spprintf.lo main/php_sprintf.lo main/fopen_wrappers.lo main/alloca.lo main/php_scandir.lo main/php_ini.lo main/SAPI.lo main/rfc1867.lo main/php_content_types.lo main/strlcpy.lo main/strlcat.lo main/mergesort.lo main/reentrancy.lo main/php_variables.lo main/php_ticks.lo main/network.lo main/php_open_temporary_file.lo main/output.lo main/getopt.lo main/streams/streams.lo main/streams/cast.lo main/streams/memory.lo main/streams/filter.lo main/streams/plain_wrapper.lo main/streams/userspace.lo main/streams/transports.lo main/streams/xp_socket.lo main/streams/mmap.lo main/streams/glob_wrapper.lo Zend/zend_language_parser.lo Zend/zend_language_scanner.lo Zend/zend_ini_parser.lo Zend/zend_ini_scanner.lo Zend/zend_alloc.lo Zend/zend_compile.lo Zend/zend_constants.lo Zend/zend_dynamic_array.lo Zend/zend_dtrace.lo Zend/zend_execute_API.lo Zend/zend_highlight.lo Zend/zend_llist.lo Zend/zend_vm_opcodes.lo Zend/zend_opcode.lo Zend/zend_operators.lo Zend/zend_ptr_stack.lo Zend/zend_stack.lo Zend/zend_variables.lo Zend/zend.lo Zend/zend_API.lo Zend/zend_extensions.lo Zend/zend_hash.lo Zend/zend_list.lo Zend/zend_indent.lo Zend/zend_builtin_functions.lo Zend/zend_sprintf.lo Zend/zend_ini.lo Zend/zend_qsort.lo Zend/zend_multibyte.lo Zend/zend_ts_hash.lo Zend/zend_stream.lo Zend/zend_iterators.lo Zend/zend_interfaces.lo Zend/zend_exceptions.lo Zend/zend_strtod.lo Zend/zend_gc.lo Zend/zend_closures.lo Zend/zend_float.lo Zend/zend_string.lo Zend/zend_signal.lo Zend/zend_generators.lo Zend/zend_virtual_cwd.lo Zend/zend_ast.lo Zend/zend_objects.lo Zend/zend_object_handlers.lo Zend/zend_objects_API.lo Zend/zend_default_classes.lo Zend/zend_execute.lo main/internal_functions_cli.lo sapi/phpdbg/phpdbg.lo sapi/phpdbg/phpdbg_prompt.lo sapi/phpdbg/phpdbg_help.lo sapi/phpdbg/phpdbg_break.lo sapi/phpdbg/phpdbg_print.lo sapi/phpdbg/phpdbg_bp.lo sapi/phpdbg/phpdbg_opcode.lo sapi/phpdbg/phpdbg_list.lo sapi/phpdbg/phpdbg_utils.lo sapi/phpdbg/phpdbg_info.lo sapi/phpdbg/phpdbg_cmd.lo sapi/phpdbg/phpdbg_set.lo sapi/phpdbg/phpdbg_frame.lo -lcrypt -lresolv -lcrypt -lrt -lrt -lm -ldl -lnsl -lxml2 -lxml2 -lxml2 -lcrypt -lxml2 -lxml2 -lxml2 -lcrypt   -o sapi/phpdbg/phpdbg
/bin/bash /home/vagrant/shared/php-src/libtool --silent --preserve-dup-deps --mode=link cc -export-dynamic -I/usr/include -g -O2 -fvisibility=hidden  -L/usr/lib/x86_64-linux-gnu  -R /usr/lib/x86_64-linux-gnu ext/date/php_date.lo ext/date/lib/astro.lo ext/date/lib/dow.lo ext/date/lib/parse_date.lo ext/date/lib/parse_tz.lo ext/date/lib/timelib.lo ext/date/lib/tm2unixtime.lo ext/date/lib/unixtime2tm.lo ext/date/lib/parse_iso_intervals.lo ext/date/lib/interval.lo ext/ereg/ereg.lo ext/ereg/regex/regcomp.lo ext/ereg/regex/regexec.lo ext/ereg/regex/regerror.lo ext/ereg/regex/regfree.lo ext/libxml/libxml.lo ext/pcre/pcrelib/pcre_chartables.lo ext/pcre/pcrelib/pcre_ucd.lo ext/pcre/pcrelib/pcre_compile.lo ext/pcre/pcrelib/pcre_config.lo ext/pcre/pcrelib/pcre_exec.lo ext/pcre/pcrelib/pcre_fullinfo.lo ext/pcre/pcrelib/pcre_get.lo ext/pcre/pcrelib/pcre_globals.lo ext/pcre/pcrelib/pcre_maketables.lo ext/pcre/pcrelib/pcre_newline.lo ext/pcre/pcrelib/pcre_ord2utf8.lo ext/pcre/pcrelib/pcre_refcount.lo ext/pcre/pcrelib/pcre_study.lo ext/pcre/pcrelib/pcre_tables.lo ext/pcre/pcrelib/pcre_valid_utf8.lo ext/pcre/pcrelib/pcre_version.lo ext/pcre/pcrelib/pcre_xclass.lo ext/pcre/php_pcre.lo ext/sqlite3/sqlite3.lo ext/sqlite3/libsqlite/sqlite3.lo ext/ctype/ctype.lo ext/dom/php_dom.lo ext/dom/attr.lo ext/dom/document.lo ext/dom/domerrorhandler.lo ext/dom/domstringlist.lo ext/dom/domexception.lo ext/dom/namelist.lo ext/dom/processinginstruction.lo ext/dom/cdatasection.lo ext/dom/documentfragment.lo ext/dom/domimplementation.lo ext/dom/element.lo ext/dom/node.lo ext/dom/string_extend.lo ext/dom/characterdata.lo ext/dom/documenttype.lo ext/dom/domimplementationlist.lo ext/dom/entity.lo ext/dom/nodelist.lo ext/dom/text.lo ext/dom/comment.lo ext/dom/domconfiguration.lo ext/dom/domimplementationsource.lo ext/dom/entityreference.lo ext/dom/notation.lo ext/dom/xpath.lo ext/dom/dom_iterators.lo ext/dom/typeinfo.lo ext/dom/domerror.lo ext/dom/domlocator.lo ext/dom/namednodemap.lo ext/dom/userdatahandler.lo ext/fileinfo/fileinfo.lo ext/fileinfo/libmagic/apprentice.lo ext/fileinfo/libmagic/apptype.lo ext/fileinfo/libmagic/ascmagic.lo ext/fileinfo/libmagic/cdf.lo ext/fileinfo/libmagic/cdf_time.lo ext/fileinfo/libmagic/compress.lo ext/fileinfo/libmagic/encoding.lo ext/fileinfo/libmagic/fsmagic.lo ext/fileinfo/libmagic/funcs.lo ext/fileinfo/libmagic/is_tar.lo ext/fileinfo/libmagic/magic.lo ext/fileinfo/libmagic/print.lo ext/fileinfo/libmagic/readcdf.lo ext/fileinfo/libmagic/readelf.lo ext/fileinfo/libmagic/softmagic.lo ext/filter/filter.lo ext/filter/sanitizing_filters.lo ext/filter/logical_filters.lo ext/filter/callback_filter.lo ext/hash/hash.lo ext/hash/hash_md.lo ext/hash/hash_sha.lo ext/hash/hash_ripemd.lo ext/hash/hash_haval.lo ext/hash/hash_tiger.lo ext/hash/hash_gost.lo ext/hash/hash_snefru.lo ext/hash/hash_whirlpool.lo ext/hash/hash_adler32.lo ext/hash/hash_crc32.lo ext/hash/hash_fnv.lo ext/hash/hash_joaat.lo ext/iconv/iconv.lo ext/json/json.lo ext/json/utf8_decode.lo ext/json/JSON_parser.lo ext/pdo/pdo.lo ext/pdo/pdo_dbh.lo ext/pdo/pdo_stmt.lo ext/pdo/pdo_sql_parser.lo ext/pdo/pdo_sqlstate.lo ext/pdo_sqlite/pdo_sqlite.lo ext/pdo_sqlite/sqlite_driver.lo ext/pdo_sqlite/sqlite_statement.lo ext/phar/util.lo ext/phar/tar.lo ext/phar/zip.lo ext/phar/stream.lo ext/phar/func_interceptors.lo ext/phar/dirstream.lo ext/phar/phar.lo ext/phar/phar_object.lo ext/phar/phar_path_check.lo ext/posix/posix.lo ext/reflection/php_reflection.lo ext/session/mod_user_class.lo ext/session/session.lo ext/session/mod_files.lo ext/session/mod_mm.lo ext/session/mod_user.lo ext/simplexml/simplexml.lo ext/simplexml/sxe.lo ext/spl/php_spl.lo ext/spl/spl_functions.lo ext/spl/spl_engine.lo ext/spl/spl_iterators.lo ext/spl/spl_array.lo ext/spl/spl_directory.lo ext/spl/spl_exceptions.lo ext/spl/spl_observer.lo ext/spl/spl_dllist.lo ext/spl/spl_heap.lo ext/spl/spl_fixedarray.lo ext/standard/crypt_freesec.lo ext/standard/crypt_blowfish.lo ext/standard/crypt_sha512.lo ext/standard/crypt_sha256.lo ext/standard/php_crypt_r.lo ext/standard/array.lo ext/standard/base64.lo ext/standard/basic_functions.lo ext/standard/browscap.lo ext/standard/crc32.lo ext/standard/crypt.lo ext/standard/cyr_convert.lo ext/standard/datetime.lo ext/standard/dir.lo ext/standard/dl.lo ext/standard/dns.lo ext/standard/exec.lo ext/standard/file.lo ext/standard/filestat.lo ext/standard/flock_compat.lo ext/standard/formatted_print.lo ext/standard/fsock.lo ext/standard/head.lo ext/standard/html.lo ext/standard/image.lo ext/standard/info.lo ext/standard/iptc.lo ext/standard/lcg.lo ext/standard/link.lo ext/standard/mail.lo ext/standard/math.lo ext/standard/md5.lo ext/standard/metaphone.lo ext/standard/microtime.lo ext/standard/pack.lo ext/standard/pageinfo.lo ext/standard/quot_print.lo ext/standard/rand.lo ext/standard/soundex.lo ext/standard/string.lo ext/standard/scanf.lo ext/standard/syslog.lo ext/standard/type.lo ext/standard/uniqid.lo ext/standard/url.lo ext/standard/var.lo ext/standard/versioning.lo ext/standard/assert.lo ext/standard/strnatcmp.lo ext/standard/levenshtein.lo ext/standard/incomplete_class.lo ext/standard/url_scanner_ex.lo ext/standard/ftp_fopen_wrapper.lo ext/standard/http_fopen_wrapper.lo ext/standard/php_fopen_wrapper.lo ext/standard/credits.lo ext/standard/css.lo ext/standard/var_unserializer.lo ext/standard/ftok.lo ext/standard/sha1.lo ext/standard/user_filters.lo ext/standard/uuencode.lo ext/standard/filters.lo ext/standard/proc_open.lo ext/standard/streamsfuncs.lo ext/standard/http.lo ext/standard/password.lo ext/tokenizer/tokenizer.lo ext/tokenizer/tokenizer_data.lo ext/xml/xml.lo ext/xml/compat.lo ext/xmlreader/php_xmlreader.lo ext/xmlwriter/php_xmlwriter.lo TSRM/TSRM.lo TSRM/tsrm_strtok_r.lo main/main.lo main/snprintf.lo main/spprintf.lo main/php_sprintf.lo main/fopen_wrappers.lo main/alloca.lo main/php_scandir.lo main/php_ini.lo main/SAPI.lo main/rfc1867.lo main/php_content_types.lo main/strlcpy.lo main/strlcat.lo main/mergesort.lo main/reentrancy.lo main/php_variables.lo main/php_ticks.lo main/network.lo main/php_open_temporary_file.lo main/output.lo main/getopt.lo main/streams/streams.lo main/streams/cast.lo main/streams/memory.lo main/streams/filter.lo main/streams/plain_wrapper.lo main/streams/userspace.lo main/streams/transports.lo main/streams/xp_socket.lo main/streams/mmap.lo main/streams/glob_wrapper.lo Zend/zend_language_parser.lo Zend/zend_language_scanner.lo Zend/zend_ini_parser.lo Zend/zend_ini_scanner.lo Zend/zend_alloc.lo Zend/zend_compile.lo Zend/zend_constants.lo Zend/zend_dynamic_array.lo Zend/zend_dtrace.lo Zend/zend_execute_API.lo Zend/zend_highlight.lo Zend/zend_llist.lo Zend/zend_vm_opcodes.lo Zend/zend_opcode.lo Zend/zend_operators.lo Zend/zend_ptr_stack.lo Zend/zend_stack.lo Zend/zend_variables.lo Zend/zend.lo Zend/zend_API.lo Zend/zend_extensions.lo Zend/zend_hash.lo Zend/zend_list.lo Zend/zend_indent.lo Zend/zend_builtin_functions.lo Zend/zend_sprintf.lo Zend/zend_ini.lo Zend/zend_qsort.lo Zend/zend_multibyte.lo Zend/zend_ts_hash.lo Zend/zend_stream.lo Zend/zend_iterators.lo Zend/zend_interfaces.lo Zend/zend_exceptions.lo Zend/zend_strtod.lo Zend/zend_gc.lo Zend/zend_closures.lo Zend/zend_float.lo Zend/zend_string.lo Zend/zend_signal.lo Zend/zend_generators.lo Zend/zend_virtual_cwd.lo Zend/zend_ast.lo Zend/zend_objects.lo Zend/zend_object_handlers.lo Zend/zend_objects_API.lo Zend/zend_default_classes.lo Zend/zend_execute.lo main/internal_functions_cli.lo sapi/cgi/cgi_main.lo sapi/cgi/fastcgi.lo -lcrypt -lresolv -lcrypt -lrt -lrt -lm -ldl -lnsl -lxml2 -lxml2 -lxml2 -lcrypt -lxml2 -lxml2 -lxml2 -lcrypt  -o sapi/cgi/php-cgi
Generating phar.php
Generating phar.phar
PEAR package PHP_Archive not installed: generated phar will require PHP's phar extension be enabled.
clicommand.inc
directorygraphiterator.inc
directorytreeiterator.inc
invertedregexiterator.inc
pharcommand.inc
phar.inc

Build complete.
Don't forget to run 'make test'.

vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 2.7665870189667
Peak memory (real = false): 324912
Peak memory (real = true): 524288
vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 2.7151489257812
Peak memory (real = false): 324912
Peak memory (real = true): 524288

vagrant@jrbasso:~/shared/php-src$ git log -1
commit 9bb2248b157bcf5b4ff77a9fa89e039a20c86490
Author: Juan Basso <jrbasso@gmail.com>
Date:   Sat Apr 19 21:19:12 2014 -0400

    Performance updates
vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 2.9928679466248
Peak memory (real = false): 328840
Peak memory (real = true): 524288
vagrant@jrbasso:~/shared/php-src$ ./sapi/cli/php json_change_perf.php
Elapsed time: 2.9838128089905
Peak memory (real = false): 328840
Peak memory (real = true): 524288