Difference in numeric calculations between .NET FW & 8

[karakasa]

Recently I tried to port a numeric calculation algorithm from .NET FW to .NET 8 and found the result is very different. For the example Circle program, .NET FW takes 708.75 steps to coverage while .NET 8 takes 1024. Both runs are in Debug mode.

The algorithm contains a considerable amount of code. Any idea on how to debug this?

[huoyaoyuan]

You can use FloatToUInt32Bits to compare the exact value of floats. The ToString formatting changed at .NET Core 3.
I don't expect the calculations to change though.

[karakasa]

You are right. The binary rep of floats stays the same.

Any idea on how to debug such issue, given that the algorithm is quiet complicated?

[huoyaoyuan]

I'd suggest printing logs and compare, as a first step to find the difference.

[Xyncgas]

Maybe implement GetHashCode which using System.Runtime.Interops.MemoryMarshal to convert float to Span`bytes and hash it using your favorite algorithm