From 01ecf8ae61089e45a27fb4770505ebe069b6b917 Mon Sep 17 00:00:00 2001
From: Shamser Ahmed <shamser.ahmed@lexisnexis.com>
Date: Wed, 13 Nov 2024 11:43:05 +0000
Subject: [PATCH] HPCC-32933 Only count the first iteration time input
 processing for the purposes of lookahead

Signed-off-by: Shamser Ahmed <shamser.ahmed@lexisnexis.com>
---
 thorlcr/activities/loop/thloopslave.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/thorlcr/activities/loop/thloopslave.cpp b/thorlcr/activities/loop/thloopslave.cpp
index fa66f36ef05..2694b93fb59 100644
--- a/thorlcr/activities/loop/thloopslave.cpp
+++ b/thorlcr/activities/loop/thloopslave.cpp
@@ -306,8 +306,14 @@ class CLoopSlaveActivity : public CLoopSlaveActivityBase
                 {
                     OwnedConstThorRow ret;
                     {
-                        LookAheadTimer t(slaveTimerStats, timeActivities);
-                        ret.setown(curInput->nextRow());
+                        if (loopCounter==1)
+                        {
+                            // the time used in first iteration is lookahead time
+                            LookAheadTimer t(slaveTimerStats, timeActivities);
+                            ret.setown(curInput->nextRow());
+                        }
+                        else
+                            ret.setown(curInput->nextRow());
                         if (!ret)
                         {
                             ret.setown(curInput->nextRow()); // more cope with groups somehow....