Optimization for core_output_filter: if the iovec is full,

don't try to concatenate buffers if we already have at least
8KB of data ready to send.  Instead, just split the brigade
and send what's currently in the iovec.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@92196 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/server/core.c b/server/core.c
index b34f7a2af7e969ce5adc6c161e1a0ffafc411b8d..af47d7e0c0f35158904b6a48bb96b2004affe139 100644 (file)
--- a/server/core.c
+++ b/server/core.c
@@ -3081,6 +3081,13 @@ static apr_status_t core_output_filter(ap_filter_t *f, apr_bucket_brigade *b)
                             apr_bucket *temp, *next;
                             apr_bucket_brigade *temp_brig;
 
+                            if (nbytes >= AP_MIN_BYTES_TO_WRITE) {
+                                /* We have enough data in the iovec
+                                 * to justify doing a writev
+                                 */
+                                more = apr_brigade_split(b, e);
+                                break;
+                            }
                             temp_brig = apr_brigade_create(f->c->pool);
                             temp = APR_BRIGADE_FIRST(b);
                             while (temp != e) {