* Store lists as lists of pointers to values rather than as lists of

  values.  This improves sharing and gives another speed up.
  Evaluation of the NixOS system attribute is now almost 7 times
  faster than the old evaluator.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/libexpr/eval-test.cc b/src/libexpr/eval-test.cc
index a7786561e81e..f7f91f503d8c 100644
--- a/src/libexpr/eval-test.cc
+++ b/src/libexpr/eval-test.cc
@@ -113,6 +113,7 @@ void run(Strings args)
     doTest(state, "with { x = 1; }; let inherit x; y = x; in y");
     doTest(state, "builtins.toXML 123");
     doTest(state, "builtins.toXML { a.b = \"x\" + \"y\"; c = [ 1 2 ] ++ [ 3 4 ]; }");
+    doTest(state, "builtins.attrNames { x = 1; y = 2; }");
 
     state.printStats();
 }