perf(crypto): avoid copying twice when returning a polynomial #371
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ashjeong
changed the title
The need for this optimization stems from the internal copying that occurs
during multiplication and division between the polynomials.
With `Poly& * operand`, copying occurs twice,
so we use `Poly * operand` instead so that copying occurs just once.
```c++
Poly Func() {
Poly& poly;
Poly operand;
return poly *= operand; // copying twice
}
```
```c++
Poly Func() {
Poly& poly;
Poly operand;
return poly * operand; // copying once
}
```
chokobole
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Description
The need for this optimization stems from the internal copying that occurs during multiplication and division between the polynomials. With
Poly& * operand, copying occurs twice, so we usePoly * operandinstead so that copying occurs just once.