For many years, sisNET users have been working with large numbers of small-sized reference files. Using small reference files was needed for good performance of MicroStation V8i and older generations, which were 32- bit applications. sisNET CE is a 64-bit application and therefore able to handle much larger DGN files. However, users have reported slower performance of attaching and detaching reference files, especially when using large numbers of them.
Since CE Update 6, version 10.17.06.26, sisNET contains an important performance improvement for repeated attaching and detaching large numbers of reference files. The improvement depends on several factors, such as the number of reference files, the hardware (physical, virtual, with or without GPU, etc.), the number of times the append and detach process is repeated, etc. This makes it hard to make an accurate prediction of performance improvements, but internal and external tests have shown clear and consistent improvements.
There are a number of further options to improve the performance of sisNET pool- and reference files: