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authorEelco Dolstra <eelco.dolstra@logicblox.com>2016-08-29T15·28+0200
committerEelco Dolstra <eelco.dolstra@logicblox.com>2016-08-29T17·36+0200
commit26d92017d3b36cff940dcb7d1611c42232edb81a (patch)
tree856350170478111ea3a61b3b457e4fbee40826ce /src/libexpr/value.hh
parentc0a7b84748d5e27e6804117b8a57ce71269c3c66 (diff)
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).
Diffstat (limited to 'src/libexpr/value.hh')
-rw-r--r--src/libexpr/value.hh9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/libexpr/value.hh b/src/libexpr/value.hh
index f5e485748812..048522016c62 100644
--- a/src/libexpr/value.hh
+++ b/src/libexpr/value.hh
@@ -250,4 +250,13 @@ void mkPath(Value & v, const char * s);
 size_t valueSize(Value & v);
 
 
+#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
+
+
 }