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* Don't create thunks for variable lookups (if possible). This

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significantly reduces the number of values allocated (e.g. from 8.7m
  to 4.9m for the Bittorrent test).
This commit is contained in:
Eelco Dolstra 2010-10-24 14:20:02 +00:00
parent 0b305c534f
commit 2dc6d50941
3 changed files with 60 additions and 23 deletions
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2
src/libexpr/primops.cc
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@ -1070,7 +1070,7 @@ void EvalState::createBaseEnv()
/* Add a wrapper around the derivation primop that computes the
`drvPath' and `outPath' attributes lazily. */
string s = "attrs: let res = derivationStrict attrs; in attrs // { drvPath = res.drvPath; outPath = res.outPath; type = \"derivation\"; }";
mkThunk(v, baseEnv, parseExprFromString(*this, s, "/"));
mkThunk_(v, parseExprFromString(*this, s, "/"));
addConstant("derivation", v);
// Paths