ios - NSMutableString appendString vs appendFormat, which is more efficient? -


given this:

nsstring *innerxml = @"somevalue"; nsmutablestring *xml = [[nsmutablestring alloc] init];

which of these faster; not asking readability, subjective:

1.

[xml appendformat:@"<randomelement>%@</randomelement>", innerxml];

2.

[xml appendstring:@"<randomelement>"]; [xml appendstring:innerxml]; [xml appendstring:@"</randomelement>"];

if curious implementation read source code, available online, see: cfstring.c.

essentially core foundation code available part of opensourceing of darwin kernel.


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