ID 329390 - Nuke 11.1 load times considerably longer with heavy noded scripts compared to Nuke11.0 and Nuke10.5

Follow

Problem summary
When opening large files in Nuke11.1v1 they are taking considerably longer to load, when compared to loading the same script in Nuke11.0 or Nuke10.5

In my testing, I received the following load times for my projects:

  • Nuke11.0v1 - 4 minutes 23 seconds
  • Nuke10.5v7 - 37 seconds

This is almost 8 times slower than on previous versions.

Additionally from testing, this appears to be a Windows only issue.

Customer reported version
nuke.11.1v1

Customer reported platform
windows10

Steps to reproduce

1) Download the attached Nuke Script (Or create a very large script (200+ nodes connected))

2) Launch Nuke11.1v1

Result: Nuke will be frozen (And look non-responsive) for a long time before the project is loaded

Workaround
- For current scripts with this problem, attempt to 'Precomp' sections of the project, this will decrease the file size and memory usage.

- For future scripts, consider precomping sections of your project using the 'LiveGroups' tool.
  Here is a link to our online help documentation on LiveGroups:
  Foundry Online Help - LiveGroups

Reproduced by support

This bug has been reproduced in:
Nuke11.1v1 - Windows 7

Unable to reproduce bug in:
Nuke11.1v1 - Mac10.13 - CentOS6.9
Nuke11.0v3 - Windows 7 - Mac10.13 - CentOS6.9
Nuke11.0v1 - Windows 7 - Mac10.13 - CentOS6.9
Nuke10.5v7 - Windows 7 - Mac10.13 - CentOS6.9

Earliest version tested
- Nuke10.5v7 - This issue no longer appears in this version and has regressed

Expected behaviour
 Acceptable load times for scripts containing a large amount of nodes with expressions.

Actual behaviour
Very slow load times in comparison to Nuke 11.0 releases.  Additionally becomes unresponsive while loading.

    We're sorry to hear that

    Please tell us why