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Preallocate memory when deriving address from key
This makes src/address.AddrForKey preallocate 32 bytes before starting the address derivation. As benches in syg_go show, reallocating temp takes 20% of the function runtime.
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@ -64,7 +64,7 @@ func AddrForKey(publicKey ed25519.PublicKey) *Address {
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buf[idx] = ^buf[idx]
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}
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var addr Address
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var temp []byte
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var temp = make([]byte, 0, 32)
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done := false
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ones := byte(0)
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bits := byte(0)
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