[Asterisk-code-review] cdr.c: Set stringfields only if they are different. (asterisk[15])

[Richard Mudgett]

Richard Mudgett has uploaded this change for review. ( https://gerrit.asterisk.org/6777


Change subject: cdr.c: Set stringfields only if they are different.
......................................................................

cdr.c: Set stringfields only if they are different.

The CDR performance gets worse the further it gets behind in processing
stasis messages.  One of the reasons is we were repeatedly setting string
fields to potentially the same string in base_process_party_a().  Setting
a string field involves allocating room for the new string out of a memory
pool which may have to allocate even more memory.

* Check to see if the string field is already set to the desired string.

ASTERISK-27335

Change-Id: I3ccb7e23f1488417e08cafe477755033eed65a7c
---
M main/cdr.c
1 file changed, 18 insertions(+), 8 deletions(-)



  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/77/6777/1

diff --git a/main/cdr.c b/main/cdr.c
index fc125f2..6a3365e 100644
--- a/main/cdr.c
+++ b/main/cdr.c
@@ -1378,8 +1378,12 @@
 	 */
 	if (!ast_test_flag(&snapshot->flags, AST_FLAG_SUBROUTINE_EXEC)
 		|| ast_test_flag(&snapshot->softhangup_flags, AST_SOFTHANGUP_HANGUP_EXEC)) {
-		ast_string_field_set(cdr, context, snapshot->context);
-		ast_string_field_set(cdr, exten, snapshot->exten);
+		if (strcmp(cdr->context, snapshot->context)) {
+			ast_string_field_set(cdr, context, snapshot->context);
+		}
+		if (strcmp(cdr->exten, snapshot->exten)) {
+			ast_string_field_set(cdr, exten, snapshot->exten);
+		}
 	}
 
 	cdr_object_swap_snapshot(&cdr->party_a, snapshot);
@@ -1389,11 +1393,15 @@
 	 * of "AppDialX". Prevent that, and any other application changes we might not want
 	 * here.
 	 */
-	if (!ast_strlen_zero(snapshot->appl)
-			&& (strncasecmp(snapshot->appl, "appdial", 7) || ast_strlen_zero(cdr->appl))
-			&& !ast_test_flag(&cdr->flags, AST_CDR_LOCK_APP)) {
-		ast_string_field_set(cdr, appl, snapshot->appl);
-		ast_string_field_set(cdr, data, snapshot->data);
+	if (!ast_test_flag(&cdr->flags, AST_CDR_LOCK_APP)
+		&& !ast_strlen_zero(snapshot->appl)
+		&& (strncasecmp(snapshot->appl, "appdial", 7) || ast_strlen_zero(cdr->appl))) {
+		if (strcmp(cdr->appl, snapshot->appl)) {
+			ast_string_field_set(cdr, appl, snapshot->appl);
+		}
+		if (strcmp(cdr->data, snapshot->data)) {
+			ast_string_field_set(cdr, data, snapshot->data);
+		}
 
 		/* Dial (app_dial) is a special case. Because pre-dial handlers, which
 		 * execute before the dial begins, will alter the application/data to
@@ -1405,7 +1413,9 @@
 		}
 	}
 
-	ast_string_field_set(cdr, linkedid, snapshot->linkedid);
+	if (strcmp(cdr->linkedid, snapshot->linkedid)) {
+		ast_string_field_set(cdr, linkedid, snapshot->linkedid);
+	}
 	cdr_object_check_party_a_answer(cdr);
 	cdr_object_check_party_a_hangup(cdr);
 

-- 
To view, visit https://gerrit.asterisk.org/6777
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Gerrit-Project: asterisk
Gerrit-Branch: 15
Gerrit-MessageType: newchange
Gerrit-Change-Id: I3ccb7e23f1488417e08cafe477755033eed65a7c
Gerrit-Change-Number: 6777
Gerrit-PatchSet: 1
Gerrit-Owner: Richard Mudgett <rmudgett at digium.com>
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