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specialize signbit(::FixedDecimal) #72

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lcontento wants to merge 1 commit into JuliaMath:master from lcontento:patch-1

lcontento commented Aug 10, 2022

The default implementation of signbit is quite slow for BigInt and Int128.
MWE:

using FixedPointDecimals
using BenchmarkTools

signbit2(x) = signbit(x.i);

x = FixedDecimal{BigInt, 10}(1);
@btime signbit($x);
@btime signbit2($x);

x = FixedDecimal{Int128, 10}(1);
@btime signbit($x);
@btime signbit2($x);


          specialize signbit(::FixedDecimal)

3b7e4db

faster than the default implementation for BigInts and Int128s

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