From e686303cd3e82c71334791b446345925e065c03e Mon Sep 17 00:00:00 2001
From: xflywind <43030857+xflywind@users.noreply.github.com>
Date: Mon, 11 Jul 2022 15:39:28 +0800
Subject: [PATCH] optimize hot spots fro orc-booting compiler

---
 compiler/astalgo.nim | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/compiler/astalgo.nim b/compiler/astalgo.nim
index bc5b7d6e17..f827ebcd75 100644
--- a/compiler/astalgo.nim
+++ b/compiler/astalgo.nim
@@ -815,16 +815,22 @@ type
     name*: PIdent
 
 proc nextIdentIter*(ti: var TIdentIter, tab: TStrTable): PSym =
+  # hot spots
   var h = ti.h and high(tab.data)
   var start = h
-  result = tab.data[h]
-  while result != nil:
-    if result.name.id == ti.name.id: break
+  var p {.cursor.} = tab.data[h]
+  while p != nil:
+    if p.name.id == ti.name.id: break
     h = nextTry(h, high(tab.data))
     if h == start:
-      result = nil
+      p = nil
       break
-    result = tab.data[h]
+    p = tab.data[h]
+  if p != nil:
+    result = p
+    GC_ref(result)
+  else:
+    result = nil
   ti.h = nextTry(h, high(tab.data))
 
 proc initIdentIter*(ti: var TIdentIter, tab: TStrTable, s: PIdent): PSym =