From 2ee2022c29ec4774eda51cb431052a9fc24982a7 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sun, 30 Dec 2018 11:45:07 +0100
Subject: [PATCH] help Nim optimize intsets.initIntSet

---
 lib/pure/collections/intsets.nim | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/lib/pure/collections/intsets.nim b/lib/pure/collections/intsets.nim
index 8034e4c0a..f6d3a3d11 100644
--- a/lib/pure/collections/intsets.nim
+++ b/lib/pure/collections/intsets.nim
@@ -217,14 +217,13 @@ proc initIntSet*: IntSet =
 
   # newSeq(result.data, InitIntSetSize)
   # result.max = InitIntSetSize-1
-  when defined(nimNoNilSeqs):
-    result.data = @[]
-  else:
-    result.data = nil
-  result.max = 0
-  result.counter = 0
-  result.head = nil
-  result.elems = 0
+  result = IntSet(
+    elems: 0,
+    counter: 0,
+    max: 0,
+    head: nil,
+    data: when defined(nimNoNilSeqs): @[] else: nil)
+  #  a: array[0..33, int] # profiling shows that 34 elements are enough
 
 proc clear*(result: var IntSet) =
   ## Clears the IntSet back to an empty state.