[core] perf: simple, quick buffer_clear()

quickly clear buffer instead of buffer_string_set_length(b, 0) or
buffer_reset(b).  Avoids free() of large buffers about to be reused,
or buffers that are module-scoped, persistent, and reused.

(buffer_reset() should still be used with buffers in connection *con
 when the data in the buffers is supplied by external, untrusted source)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/http_chunk.c b/src/http_chunk.c
index 3c620773..1bdf2fa8 100644
--- a/src/http_chunk.c
+++ b/src/http_chunk.c
@@ -23,7 +23,7 @@
 #include <string.h>
 
 static buffer * http_chunk_header(buffer *b, uintmax_t len) {
-    buffer_string_set_length(b, 0);
+    buffer_clear(b);
     buffer_append_uint_hex(b, len);
     buffer_append_string_len(b, CONST_STR_LEN("\r\n"));
     return b;