diff --git a/wow/WoWLogSplit/WoWLogSplit.xcodeproj/project.pbxproj b/wow/WoWLogSplit/WoWLogSplit.xcodeproj/project.pbxproj
index ad163cd..e64625c 100644
--- a/wow/WoWLogSplit/WoWLogSplit.xcodeproj/project.pbxproj
+++ b/wow/WoWLogSplit/WoWLogSplit.xcodeproj/project.pbxproj
@@ -391,6 +391,7 @@
 		B973D77D151505A600401595 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				GCC_ENABLE_OBJC_GC = required;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "WoWLogSplit/WoWLogSplit-Prefix.pch";
 				INFOPLIST_FILE = "WoWLogSplit/WoWLogSplit-Info.plist";
@@ -402,6 +403,7 @@
 		B973D77E151505A600401595 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				GCC_ENABLE_OBJC_GC = required;
 				GCC_PRECOMPILE_PREFIX_HEADER = YES;
 				GCC_PREFIX_HEADER = "WoWLogSplit/WoWLogSplit-Prefix.pch";
 				INFOPLIST_FILE = "WoWLogSplit/WoWLogSplit-Info.plist";
diff --git a/wow/WoWLogSplit/WoWLogSplit/FileReader.h b/wow/WoWLogSplit/WoWLogSplit/FileReader.h
index 306581f..bc2b82d 100644
--- a/wow/WoWLogSplit/WoWLogSplit/FileReader.h
+++ b/wow/WoWLogSplit/WoWLogSplit/FileReader.h
@@ -19,6 +19,7 @@
 	unsigned long long	m_totalFileLength;		/**< Total number of bytes in file. */
 	NSString*			m_lineDelimiter;		/**< Character for line break or page break. */
 	NSUInteger			m_chunkSize;			/**< Standard block size. */
+	NSUInteger          m_delimiterCount;
 }
 
 - (id)initWithFilePath:(NSString*)filePath;
diff --git a/wow/WoWLogSplit/WoWLogSplit/FileReader.m b/wow/WoWLogSplit/WoWLogSplit/FileReader.m
index 5676b50..82626ff 100644
--- a/wow/WoWLogSplit/WoWLogSplit/FileReader.m
+++ b/wow/WoWLogSplit/WoWLogSplit/FileReader.m
@@ -49,7 +49,8 @@ - (id)initWithFilePath:(NSString*)filePath {
 		[m_fileHandle seekToEndOfFile];
 		m_totalFileLength = [m_fileHandle offsetInFile];				
 		m_currentInset = m_totalFileLength;						
-		m_prevDelimiterRange = NSMakeRange(m_currentInset, 1);			
+		m_prevDelimiterRange = NSMakeRange(m_currentInset, 1);
+		m_delimiterCount = 0;
 		
 		NSLog(@"%qu characters in %@", m_totalFileLength, [filePath lastPathComponent]); /* DEBUG LOG */
 	}
@@ -69,7 +70,9 @@ - (NSString*)readLine {
 		return nil;
 	}
 	
-	NSData* newLineData = [m_lineDelimiter dataUsingEncoding:NSUTF8StringEncoding];
+	static NSData* newLineData = nil;
+	if (!newLineData)
+		newLineData = [m_lineDelimiter dataUsingEncoding:NSUTF8StringEncoding];
 	[m_fileHandle seekToFileOffset:m_currentOffset];
 	NSMutableData* currentData = [[NSMutableData alloc] init];
 	BOOL shouldReadMore = YES;
@@ -84,13 +87,19 @@ - (NSString*)readLine {
 		if (newLineRange.location != NSNotFound) {
 			// Include the length so we can include the delimiter in the string.
 			NSRange subDataRange = NSMakeRange(0, newLineRange.location + [newLineData length]);
+			NSData *subchunk = chunk;
 			chunk = [chunk subdataWithRange:subDataRange];
+			[subchunk release], subchunk = nil;
 			shouldReadMore = NO;
+			m_delimiterCount++;
+			m_chunkSize = MAX(m_chunkSize, MAX(10, 1 + ((m_currentOffset + [chunk length] + 2) / m_delimiterCount)));
+			if ((m_delimiterCount % 1000) == 0)
+				NSLog(@"chunkSize:%lu", m_chunkSize);
 		}
 		[currentData appendData:chunk];
 		m_currentOffset += [chunk length];
+		[chunk release], chunk = nil;
 	}
-	
 	NSString* line = [currentData stringValueWithEncoding:NSUTF8StringEncoding];
     // finished with data
     [currentData release], currentData = nil;
diff --git a/wow/WoWLogSplit/WoWLogSplit/WLSAppDelegate.m b/wow/WoWLogSplit/WoWLogSplit/WLSAppDelegate.m
index 504c435..540bcf7 100644
--- a/wow/WoWLogSplit/WoWLogSplit/WLSAppDelegate.m
+++ b/wow/WoWLogSplit/WoWLogSplit/WLSAppDelegate.m
@@ -64,10 +64,17 @@ - (IBAction)splitLogFile:(id)sender {
 			NSLog(@"File:%@ (%@)", fileName, datePart);
 			[[NSFileManager defaultManager] createFileAtPath:fileName contents:nil attributes:nil];
 			out = [NSFileHandle fileHandleForWritingAtPath:fileName];
+			datePart = nil;
+			fileName = nil;
 		}
 		[out writeData:[line dataUsingEncoding:NSUTF8StringEncoding]];
+		[line release], line = nil;
+		[data release], data = nil;
 	}
 	[out closeFile];
+	out = nil;
+	[reader release], reader = nil;
+	[dateFormat release], dateFormat = nil;
 }
 
 - (IBAction)archiveSplitLogs:(id)sender {
diff --git a/wow/WoWLogSplit/WoWLogSplit/WoWLogLine.m b/wow/WoWLogSplit/WoWLogSplit/WoWLogLine.m
index 24fca39..65e2866 100644
--- a/wow/WoWLogSplit/WoWLogSplit/WoWLogLine.m
+++ b/wow/WoWLogSplit/WoWLogSplit/WoWLogLine.m
@@ -79,7 +79,7 @@ + (id) fromString:(NSString *) string
 		NSLog(@"Bad time, h:%d m:%d s:%d ms:%d parts:%@", timeHour, timeMinute, timeSecond, timeMS, timeParts);
 		return nil;
 	}
-	WoWLogLine *line = [[WoWLogLine alloc] init];
+	WoWLogLine *line = [[[WoWLogLine alloc] init] autorelease];
 	NSDateComponents *dc = [WoWLogLine dateComponents];
 	[dc setMonth:dateMonth];
 	[dc setDay:dateDay];