Add builtin function "partition"

The implementation of "partition" in Nixpkgs is O(n^2) (because of the
use of ++), and for some reason was causing stack overflows in
multi-threaded evaluation (not sure why).

This reduces "nix-env -qa --drv-path" runtime by 0.197s and memory
usage by 298 MiB (in non-Boehm mode).

1 files changed, 0 insertions, 9 deletions

diff --git a/src/libexpr/json-to-value.cc b/src/libexpr/json-to-value.cc
index 1daf84600..f671802bc 100644
--- a/src/libexpr/json-to-value.cc
+++ b/src/libexpr/json-to-value.cc
@@ -12,15 +12,6 @@ static void skipWhitespace(const char * & s)
 }
 
 
-#if HAVE_BOEHMGC
-typedef std::vector<Value *, gc_allocator<Value *> > ValueVector;
-typedef std::map<Symbol, Value *, std::less<Symbol>, gc_allocator<Value *> > ValueMap;
-#else
-typedef std::vector<Value *> ValueVector;
-typedef std::map<Symbol, Value *> ValueMap;
-#endif
-
-
 static string parseJSONString(const char * & s)
 {
     string res;