Improve performance in json stream parsing

:Release Notes:
Add yajl_dont_validate_strings for Yajl 2.
Custom simple memory pool.
Throughput measurement in MBps.
Add pool of dom parsers.

:Detailed Notes:
Add yajl_dont_validate_strings for Yajl 2.
Memory pool gives us a big win in performance.
Fix performance tests to measure the throughput in MB/s.
Some small improvements and code refactoring.

:Testing Performed:
gtest

:QA Notes:

:Issues Addressed:
[BHV-123] pbnjson: Improve performance of json parsing with YAJL

Open-webOS-DCO-1.0-Signed-off-by: Andrii Zora <[email protected]>

Change-Id: Ic2b49103cf438c77e48f961258e9842fd84fb7d0
Reviewed-on: https://g2g.palm.com/4631
Reviewed-by: DCO Verification
Reviewed-by: Andrii Zora <[email protected]>
Tested-by: Andrii Zora <[email protected]>
Reviewed-by: Anatolii Sakhnik <[email protected]>
Tested-by: Anatolii Sakhnik <[email protected]>

Author: anaxarsys

CMakeLists.txt

@@ -26,10 +26,11 @@ webos_component(2 5 0)
 include(FindPkgConfig)
 
 find_library(GMP_LIBRARY gmp ${LIB_INSTALL_DIR})
+find_package(Threads)
 
 pkg_check_modules(GLIB2 REQUIRED glib-2.0)
 include_directories(${GLIB2_INCLUDE_DIRS})
-webos_add_compiler_flags(ALL -Wall -D__STRICT_ANSI__ ${GLIB2_CFLAGS_OTHER})
+webos_add_compiler_flags(ALL -Wall -D__STRICT_ANSI__ ${GLIB2_CFLAGS_OTHER} -pthread)
 
 # YAJL-1 doesn't ship any pkg-check module
 pkg_check_modules(YAJL yajl)

src/pbnjson_c/CMakeLists.txt

@@ -1,6 +1,6 @@
 # @@@LICENSE
 #
-#      Copyright (c) 2009-2013 LG Electronics, Inc.
+#      Copyright (c) 2009-2014 LG Electronics, Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -71,7 +71,14 @@ add_library(
 	jschema.c
 	jvalidation.c
 	)
-target_link_libraries(pbnjson_c jvalue schema_validation ${GLIB2_LDFLAGS} ${YAJL_LDFLAGS})
+target_link_libraries(
+	pbnjson_c
+	jvalue
+	schema_validation
+	${GLIB2_LDFLAGS}
+	${YAJL_LDFLAGS}
+	${CMAKE_THREAD_LIBS_INIT}
+	)
 set_target_properties(pbnjson_c PROPERTIES DEFINE_SYMBOL PJSON_SHARED)
 
 include_directories(

src/pbnjson_c/jobject.c

@@ -1228,15 +1228,16 @@ bool jarray_has_duplicates(jvalue_ref arr)
 	assert(jis_array(arr));
 
 	ssize_t size = jarray_size(arr);
-	if (size < 2)
-		return false;
 
 	for (ssize_t i = 0; i < size - 1; ++i)
+	{
+		jvalue_ref jvali = *jarray_get_unsafe(arr, i);
 		for (ssize_t j = i + 1; j < size; ++j)
 		{
-			if (jvalue_equal(*jarray_get_unsafe(arr, i), *jarray_get_unsafe(arr, j)))
+			if (jvalue_equal(jvali, *jarray_get_unsafe(arr, j)))
 				return true;
 		}
+	}
 
 	return false;
 }