Switching to ordinal string comparison is as simple as supplying StringComparison.Ordinal as the final argument to String.Equals: myString.Equals(otherString, StringComparison.Ordinal) īeyond switching to ordinal comparisons, certain C# String APIs are known to be extremely inefficient. It’s roughly ten times faster to use the ordinal comparison type, which compares strings in a manner familiar to C and C++ programmers: by simply comparing each sequential byte of the string, without regard for the character represented by that byte. These APIs were built for business applications, and attempt to deal with handling strings from many different cultural and linguistic rules with regards to the characters found in text.įor example, the following example code returns true when run under the US-English locale, but returns false for many European locales.Īs of Unity 5.3 and 5.4, Unity’s scripting runtimes always run under the US English (en-US) locale: String.Equals("encyclopedia", “encyclopædia”) įor most Unity projects, this is entirely unnecessary. One of the core performance problems often found in string-related code is the unintended use of the slow, default string APIs.
Microsoft maintains a list of best practices for working with strings in C#, which can be found here on the MSDN website:. The StringBuilder instance can also be reused to further minimize unnecessary memory allocation.
#Strings and beyond contact serial#
This is relatively expensive, and repeated string concatenations can develop into performance problems when performed on large strings, on large datasets, or in tight loops.įurther, as N string concatenations require the allocation of N–1 intermediate strings, serial concatenations can also be a major cause of managed memory pressure.įor cases where strings must be concatenated in tight loops or during each frame, use a StringBuilder to perform the actual concatenation operations.
#Strings and beyond contact full#
Any manipulation of a string results in the allocation of a full new string. Most packages are immutable, including packages downloaded from the package registry or by Git URL. In C#, all strings are immutable You cannot change the contents of an immutable (read-only) package. Handling strings and text is a common source of performance problems in Unity projects.
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