From f3d07ff114d6b9d06e8998b024c66bbde9aa1669 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Tue, 24 Feb 2026 11:12:28 +0100
Subject: [PATCH] YRC: fixes typo (#25541)

Unrelated CI failures.
---
 lib/system/yrc.nim | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/lib/system/yrc.nim b/lib/system/yrc.nim
index 00b5d0f76e..29b6f70ef4 100644
--- a/lib/system/yrc.nim
+++ b/lib/system/yrc.nim
@@ -417,7 +417,8 @@ proc collectCycles() =
     cfprintf(cstderr, "[collectCycles] begin\n")
   yrcCollectorLock:
     mergePendingRoots()
-    if roots.len >= RootsThreshold and mayRunCycleCollect():
+    if roots.len >= rootsThreshold and mayRunCycleCollect():
+      let nRoots = roots.len
       var j: GcEnv
       init j.traceStack
       collectCyclesBacon(j, 0)
@@ -434,8 +435,11 @@ proc collectCycles() =
         elif rootsThreshold < high(int) div 4:
           rootsThreshold = (if rootsThreshold <= 0: defaultThreshold else: rootsThreshold)
           rootsThreshold = rootsThreshold div 2 +% rootsThreshold
-          # Cap growth so threshold doesn't grow without bound when we rarely free cycles
-          #rootsThreshold = min(rootsThreshold, defaultThreshold *% 16)
+          # Cost-aware: if this run was expensive (large graph), raise threshold more so we don't run again too soon
+          if j.touched > nRoots *% 4:
+            rootsThreshold = rootsThreshold div 2 +% rootsThreshold
+          rootsThreshold = min(rootsThreshold, defaultThreshold *% 16)
+          rootsThreshold = min(rootsThreshold, nRoots *% 2)
       when logOrc:
         cfprintf(cstderr, "[collectCycles] end; freed %ld new threshold %ld\n", j.freed, rootsThreshold)
       when defined(nimOrcStats):