The cost of 1 roughly corresponds to 0.1 microsecond of runtime (on my MacBook Pro) with the rust implementation.
Some really cheap operations had to be rounded up to cost 1.
You'll also notice that the the bytes cost dividers are smaller, meaning the cost per byte is higher now. This is a natural consequence of all operations being faster, the cost of accessing memory has not improved as much by the rust implementation and is relatively slower.
The cost of 1 roughly corresponds to 0.1 microsecond of runtime (on my MacBook Pro) with the rust implementation. Some really cheap operations had to be rounded up to cost 1.
You'll also notice that the the bytes cost dividers are smaller, meaning the cost per byte is higher now. This is a natural consequence of all operations being faster, the cost of accessing memory has not improved as much by the rust implementation and is relatively slower.