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Parse least common datatype last

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Null types are almost certainly the least common object, so putting the
check last in the list will be faster.

This gave an approximate 5% performance improvement in parse_value() in
tests.
This commit is contained in:
Roger Light 2023-08-10 08:28:00 +01:00
parent cb8693b058
commit bb27ffa152
1 changed files with 7 additions and 7 deletions
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14
cJSON.c
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@ -1317,13 +1317,6 @@ static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buf
} }
/* parse the different types of values */ /* parse the different types of values */
/* null */
if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0))
{
item->type = cJSON_NULL;
input_buffer->offset += 4;
return true;
}
/* false */ /* false */
if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0)) if (can_read(input_buffer, 5) && (strncmp((const char*)buffer_at_offset(input_buffer), "false", 5) == 0))
{ {
@ -1359,6 +1352,13 @@ static cJSON_bool parse_value(cJSON * const item, parse_buffer * const input_buf
{ {
return parse_object(item, input_buffer); return parse_object(item, input_buffer);
} }
/* null */
if (can_read(input_buffer, 4) && (strncmp((const char*)buffer_at_offset(input_buffer), "null", 4) == 0))
{
item->type = cJSON_NULL;
input_buffer->offset += 4;
return true;
}
return false; return false;
} }