From 18ac9855260244e41e6cd3d4c506ef8f3b5d7c45 Mon Sep 17 00:00:00 2001
From: Spoike <acceptthis@users.sourceforge.net>
Date: Sun, 22 Sep 2013 06:28:14 +0000
Subject: [PATCH] Don't realloc console lines quite so much. Should let spammy
 stuff like timedemos run a tiny smidge faster.

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@4479 fc73d0e0-1445-4013-8a0c-d673dee63da5
---
 engine/client/console.c | 32 +++++++++++++++++++++++++++-----
 engine/common/console.h |  3 +++
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/engine/client/console.c b/engine/client/console.c
index 722fe6771..85dc752b8 100644
--- a/engine/client/console.c
+++ b/engine/client/console.c
@@ -656,6 +656,7 @@ void Con_PrintCon (console_t *con, char *txt)
 	conchar_t expanded[4096];
 	conchar_t *c;
 	conline_t *oc;
+	conline_t *reuse;
 
 	COM_ParseFunString(CON_WHITEMASK, txt, expanded, sizeof(expanded), false);
 
@@ -673,6 +674,7 @@ void Con_PrintCon (console_t *con, char *txt)
 			break;
 		case '\n':
 			con->cr = false;
+			reuse = NULL;
 			while (con->linecount >= con_maxlines.ival)
 			{
 				if (con->oldest == con->current)
@@ -686,7 +688,10 @@ void Con_PrintCon (console_t *con, char *txt)
 				if (con->display == con->oldest)
 					con->display = con->oldest->newer;
 				con->oldest = con->oldest->newer;
-				Z_Free(con->oldest->older);
+				if (reuse)
+					Z_Free(con->oldest->older);
+				else
+					reuse = con->oldest->older;
 				con->oldest->older = NULL;
 				con->linecount--;
 			}
@@ -701,9 +706,20 @@ void Con_PrintCon (console_t *con, char *txt)
 				TTS_SayConString((conchar_t*)(con->current+1));
 #endif
 
-			con->current->newer = Z_Malloc(sizeof(conline_t) + sizeof(conchar_t));
-			con->current->newer->older = con->current;
-			con->current = con->current->newer;
+			if (!reuse)
+			{
+				reuse = Z_Malloc(sizeof(conline_t) + sizeof(conchar_t));
+				reuse->maxlength = 1;
+			}
+			else
+			{
+				reuse->newer = NULL;
+				reuse->older = NULL;
+			}
+			reuse->id = ++con->nextlineid;
+			reuse->older = con->current;
+			con->current->newer = reuse;
+			con->current = reuse;
 			con->current->length = 0;
 			o = (conchar_t *)(con->current+1)+con->current->length;
 			*o = 0;
@@ -723,7 +739,13 @@ void Con_PrintCon (console_t *con, char *txt)
 				con->selendline = NULL;
 
 			oc = con->current;
-			con->current = BZ_Realloc(con->current, sizeof(*con->current)+(con->current->length+2)*sizeof(conchar_t));
+			if (oc->length+2 > oc->maxlength)
+			{
+				oc->maxlength = (oc->length+2)+8;
+				if (oc->maxlength < oc->length)
+					oc->length = 0;	//don't crash from console line overflows.
+				con->current = BZ_Realloc(con->current, sizeof(*con->current)+(oc->maxlength)*sizeof(conchar_t));
+			}
 			if (con->display == oc)
 				con->display = con->current;
 			if (con->oldest == oc)
diff --git a/engine/common/console.h b/engine/common/console.h
index c9148279c..defbeb392 100644
--- a/engine/common/console.h
+++ b/engine/common/console.h
@@ -102,7 +102,9 @@ typedef struct conline_s {
 	struct conline_s *older;
 	struct conline_s *newer;
 	unsigned short length;
+	unsigned short maxlength;
 	unsigned short lines;
+	unsigned short id;
 	float time;
 } conline_t;
 
@@ -114,6 +116,7 @@ typedef struct conline_s {
 typedef struct console_s
 {
 	int id;
+	int nextlineid;	//the current line being written to. so we can rewrite links etc.
 	char name[64];
 	char title[64];
 	int linecount;