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Timeline for Is String.Format as efficient as StringBuilder

Current License: CC BY-SA 4.0

12 events
when toggle format what by license comment
Mar 7, 2019 at 17:19 history edited Kev CC BY-SA 4.0
added 120 characters in body
Feb 7, 2016 at 17:59 history edited Markus Safar CC BY-SA 3.0
Reformatted the code
Jan 12, 2015 at 12:28 comment added Chris F Carroll 6 years later, this ain't quite so anymore. In Net4, string.Format() creates and caches a StringBuilder instance which it reuses, so it might in some test cases be faster than StringBuilder. I've put a revised benchmark in answer below (which still says that concat is fastest and for my test case, format is 10% slower than StringBuilder).
Jul 19, 2013 at 21:28 comment added Ben Collins One problem with the benchmarks on Jerry Dixon's page is that he never calls .ToString() on the StringBuilder object. Over a great many iterations, that time makes a big difference, and means that he's not quite comparing apples to apples. That's the reason he shows such great performance for StringBuilder and probably accounts for his surprise. I just repeated the benchmark correcting that mistake and got the expected results: the String + operator was fastest, followed by StringBuilder, with String.Format bringing up the rear.
Dec 8, 2011 at 11:48 history edited Kev CC BY-SA 3.0
added 9 characters in body
Aug 2, 2011 at 14:24 history edited Kev CC BY-SA 3.0
Repair link rot
Feb 24, 2011 at 22:35 history edited Kev CC BY-SA 2.5
deleted 7 characters in body
Aug 23, 2009 at 12:47 vote accept lomaxx
Aug 9, 2008 at 16:45 history edited Kev CC BY-SA 2.5
Aug 9, 2008 at 16:25 history edited Kev CC BY-SA 2.5
Added link benchmarks
Aug 9, 2008 at 16:18 history edited Kev CC BY-SA 2.5
Making the point about the importance benchmarking a little clearer.
Aug 9, 2008 at 15:57 history answered Kev CC BY-SA 2.5