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Improve json_object -> string performance

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Removes variadic prints for ~3x performance improvement.
This commit is contained in:
Quentin Young
2017-02-02 17:16:26 +00:00
parent 8157784483
commit 9ff0f4987f
5 changed files with 19 additions and 82 deletions
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15
json_object.c
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@@ -147,9 +147,13 @@ static int json_escape_str(struct printbuf *pb, const char *str, int len, int fl
printbuf_memappend(pb,
str + start_offset,
pos - start_offset);
sprintbuf(pb, "\\u00%c%c",
json_hex_chars[c >> 4],
json_hex_chars[c & 0xf]);
static char sbuf[7];
snprintf(sbuf, sizeof(sbuf),
"\\u00%c%c",
json_hex_chars[c >> 4],
json_hex_chars[c & 0xf]);
printbuf_memappend (pb, sbuf, sizeof(sbuf) - 1);
start_offset = ++pos;
} else
pos++;
@@ -585,7 +589,10 @@ static int json_object_int_to_json_string(struct json_object* jso,
int level,
int flags)
{
return sprintbuf(pb, "%" PRId64, jso->o.c_int64);
/* room for 19 digits, the sign char, and a null term */
static char sbuf[21];
snprintf(sbuf, sizeof(sbuf), "%"PRId64, jso->o.c_int64);
return sprintbuf(pb, sbuf);
}
struct json_object* json_object_new_int(int32_t i)