init capacity #96
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init capacity #96
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avoid StringBuilder resize due to capacity
hk1ll3r
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Jun 20, 2022
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hk1ll3r
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hk1ll3r
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I'm not sure if this tradeoff between space and exec time is desired.
If you have the time to compute the string length from UTF32 code points in a helper method like ComputeStringLength(), we can use that here.
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| public override string ToString() { | ||
| StringBuilder sb = new StringBuilder(); | ||
| StringBuilder sb = new StringBuilder(length * 2); |
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Ideally we should set the capacity to the eventual length of the string which we could compute by replicating the surrogate pair logic in our code. 2*length is an upper bound and allocates twice as much memory as is needed in most cases.
| public string ToDebugString() | ||
| { | ||
| StringBuilder sb = new StringBuilder(); | ||
| StringBuilder sb = new StringBuilder(length * 3); |
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Let's not worry about performance of debug code.
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ToStringavoid StringBuilder resize due to capacityToDebugStringchang append (string) -> append(char)