Sped up table view creation to reuse date formatter

MacPass/MPAutotypeCommand.h

@@ -0,0 +1,13 @@
+//
+//  MPAutotypeCommand.h
+//  MacPass
+//
+//  Created by Michael Starke on 10/11/13.
+//  Copyright (c) 2013 HicknHack Software GmbH. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface MPAutotypeCommand : NSObject
+
+@end

MacPass/MPAutotypeCommand.m

@@ -0,0 +1,13 @@
+//
+//  MPAutotypeCommand.m
+//  MacPass
+//
+//  Created by Michael Starke on 10/11/13.
+//  Copyright (c) 2013 HicknHack Software GmbH. All rights reserved.
+//
+
+#import "MPAutotypeCommand.h"
+
+@implementation MPAutotypeCommand
+
+@end

MacPass/MPEntryViewController.m

@@ -249,9 +249,14 @@ NSString *const _MPTAbleSecurCellView = @"PasswordCell";
     }
     if(isModifedColumn) {
       if(![[view textField] formatter]) {
-        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
+        /* Just use one formatter instance since it's expensive to create */
+        static NSDateFormatter *formatter = nil;
+        static dispatch_once_t onceToken;
+        dispatch_once(&onceToken, ^{
+          formatter = [[NSDateFormatter alloc] init];
           [formatter setDateStyle:NSDateFormatterMediumStyle];
           [formatter setTimeStyle:NSDateFormatterMediumStyle];
+        });
         [textField setFormatter:formatter];
       }
       [textField bind:NSValueBinding toObject:entry.timeInfo withKeyPath:@"lastModificationTime" options:nil];