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* When allocating an attribute set, reserve enough space for all

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elements.  This prevents the vector from having to resize itself.
This commit is contained in:
Eelco Dolstra 2010-10-24 20:09:37 +00:00
parent e0b7fb8f27
commit 43535499f3
4 changed files with 21 additions and 28 deletions
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6
src/nix-env/user-env.cc
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@ -61,7 +61,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
Value & v(*state.allocValue());
manifest.list.elems[n++] = &v;
state.mkAttrs(v);
state.mkAttrs(v, 8);
mkString(*state.allocAttr(v, state.sType), "derivation");
mkString(*state.allocAttr(v, state.sName), i->name);
@ -71,7 +71,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
mkString(*state.allocAttr(v, state.sDrvPath), i->queryDrvPath(state));
Value & vMeta = *state.allocAttr(v, state.sMeta);
state.mkAttrs(vMeta);
state.mkAttrs(vMeta, 16);
MetaInfo meta = i->queryMetaInfo(state);
@ -118,7 +118,7 @@ bool createUserEnv(EvalState & state, DrvInfos & elems,
/* Construct a Nix expression that calls the user environment
builder with the manifest as argument. */
Value args, topLevel;
state.mkAttrs(args);
state.mkAttrs(args, 3);
mkString(*state.allocAttr(args, state.sSystem), thisSystem);
mkString(*state.allocAttr(args, state.symbols.create("manifest")),
manifestFile, singleton<PathSet>(manifestFile));