From 95b8cee898bc428a81cda5f7944eeddbef29067b Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sat, 15 Nov 2025 19:49:07 +0100
Subject: [PATCH] Using cbrt() instead of exp(log...) might be more efficient

---
 src/spicelib/analysis/cktterr.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/spicelib/analysis/cktterr.c b/src/spicelib/analysis/cktterr.c
index 9852b2acf..f2868e6ac 100644
--- a/src/spicelib/analysis/cktterr.c
+++ b/src/spicelib/analysis/cktterr.c
@@ -69,7 +69,9 @@ CKTterr(int qcap, CKTcircuit *ckt, double *timeStep)
     del = ckt->CKTtrtol * tol/MAX(ckt->CKTabstol,factor * fabs(diff[0]));
     if(ckt->CKTorder == 2) {
         del = sqrt(del);
-    } else if (ckt->CKTorder > 2) {
+    } else if (ckt->CKTorder == 3) {
+        del = cbrt(del);
+    } else if (ckt->CKTorder > 3) {
         del = exp(log(del)/ckt->CKTorder);
     }
     *timeStep = MIN(*timeStep,del);