[chinwobble]

Context

Perf analysis shows the function findInsertSpot shows allocates several gig of memory when running paket install on this repo.

The changes in this PR remove unnecessary calls to XmlNode.ToString() to reduce memory allocations to System.String and StringBuilder.

The results below show that total allocations is reduced by 8 GB.

Before GC Stats

Total CPU Time: 99,949 msec
Total GC CPU Time: 5,216 msec
Total Allocs : 22,922.339 MB
Number of Heaps: 1
GC CPU MSec/MB Alloc : 0.228 MSec/MB
Total GC Pause: 6,418.9 msec
% Time paused for Garbage Collection: 3.0%
% CPU Time spent Garbage Collecting: 5.2%
Max GC Heap Size: 240.740 MB
Peak Process Working Set: 398.725 MB
Peak Virtual Memory Usage: 2,481,102.819 MB

After GC Stats

Total CPU Time: 62,869 msec
Total GC CPU Time: 4,305 msec
Total Allocs : 14,944.830 MB
Number of Heaps: 1
GC CPU MSec/MB Alloc : 0.288 MSec/MB
Total GC Pause: 5,261.2 msec
% Time paused for Garbage Collection: 4.8%
% CPU Time spent Garbage Collecting: 6.8%
Max GC Heap Size: 209.375 MB
Peak Process Working Set: 344.039 MB
Peak Virtual Memory Usage: 2,481,072.738 MB

[chinwobble]

@forki are you able to review this PR?

[dsyme]

/repo-assist review this PR and respond with a comment

[github-actions]

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[dsyme]

/repo-assist review this PR and respond with a comment

[github-actions]

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[github-actions]

🤖 This is an automated response from Repo Assist.

I reviewed this PR's diff (findInsertSpot in ProjectFile.fs). Overall this looks like a solid, well-targeted perf fix:

• Root cause correctly identified: the original loops called .OuterXml.ToString() on every child node just to check a string prefix ("<import", "<PropertyGroup"), which is expensive since OuterXml serializes the whole subtree. Doing this for every node in every project scanned explains the multi-GB allocations shown in the profiler.
• Fix is sound: replacing the OuterXml prefix checks with Name.Equals(..., StringComparison.OrdinalIgnoreCase) avoids the serialization entirely for the common case, and OuterXml is now only computed when the node is actually an Import element (where the label/paket substring checks are still needed).
• Control flow refactor (loop with if/elif/continueLooping instead of a compound boolean while condition) is a bit more verbose but preserves the original short-circuit semantics: stop on the first node that is neither a matching PropertyGroup nor a non-paket Import. I traced through it and it looks equivalent to the original.
• The reported GC stats (22.9 GB → 14.9 GB total allocations, ~37% CPU time reduction) are a meaningful, measurable win, and the change is narrowly scoped to this one function plus a trivial whitespace fix elsewhere.

One minor suggestion for the author (non-blocking): the two-line whitespace-only change near AppendChild on AutoGenerateBindingRedirects is unrelated to the perf fix — could be dropped to keep the diff minimal, though it's harmless either way.

No functional concerns from my read of the diff. This looks ready for a maintainer's review/merge decision.

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