8000 DwgReader.Read incredibly slow on macOS · Issue #578 · DomCR/ACadSharp · GitHub
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DwgReader.Read incredibly slow on macOS #578

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mvarie opened this issue Mar 11, 2025 · 3 comments
Open

DwgReader.Read incredibly slow on macOS #578

mvarie opened this issue Mar 11, 2025 · 3 comments
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question Further information is requested SPIKE Investigation related

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@mvarie
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mvarie commented Mar 11, 2025 •
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Using the same project and source file, DwgReader.Read takes a few seconds on Windows but several minutes on macOS - regardless of whether the crc check is enabled.

Just in case, I’ve tested different files and IDEs while debugging, but the result is always the same.
Other than the difference in performance, there are no other discrepancies—the end result is the same, and it works flawlessly. It just takes forever on macOS.

I understand that non-Windows platforms might be unsupported, and I have no expectations in that regard. I’m just curious to know if this is a known issue, and if not, whether anyone has ideas on where to look for potential causes.

I might be overlooking something obvious here, so any insights would be appreciated.
@DomCR DomCR added the question Further information is requested label Mar 11, 2025
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DomCR commented Mar 11, 2025

Hi @mvarie,

I've noticed that using the .NET Framework vs .NET have a different performance time being .NET faster, have you tested in both?

If that doesn't help, I think that I won't be able to resolve this issue because it seems a platform limitation.

@mvarie
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mvarie commented Mar 11, 2025

@DomCR I’m using .NET 8 on both platforms—it’s literally the same project. However, my macOS platform is significantly faster than the Windows machine I’m using for this test, which is quite odd. I regularly develop .NET Core (C#) applications on both platforms and have never noticed such a difference. In fact, when working with managed .NET Core without Win32 dependencies, performance is typically smooth across the board.

I’m going to investigate further, but before diving in, I wanted to check if this is a known issue. If possible, I’d appreciate it if you could keep this open—I’d like to report back with my findings, whether I identify the cause or not.

@DomCR DomCR added the SPIKE Investigation related label Mar 13, 2025
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DomCR commented Mar 13, 2025

I've found this article on stackoverflow:
https://stackoverflow.com/questions/73945754/performance-difference-between-windows-and-macos-net-console-app#:~:text=Windows%3A%20988%2C000%2D1%2C020%2C000%20ticks,roughly%20a%20170x%20performance%20difference)

The selected answer also provides more insight about the issue.

Regardless if you find something particular in the library don't hesitate to post an issue or a PR, I'll be happy to review it.

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