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25 lines
1.3 KiB
Markdown
25 lines
1.3 KiB
Markdown
# Release 0.16 (2010-08-17)
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This release has the following improvements:
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- The Nix expression evaluator is now much faster in most cases:
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typically, [3 to 8 times compared to the old
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implementation](http://www.mail-archive.com/nix-dev@cs.uu.nl/msg04113.html).
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It also uses less memory. It no longer depends on the ATerm library.
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- Support for configurable parallelism inside builders. Build scripts
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have always had the ability to perform multiple build actions in
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parallel (for instance, by running `make -j
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2`), but this was not desirable because the number of actions to be
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performed in parallel was not configurable. Nix now has an option
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`--cores
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N` as well as a configuration setting `build-cores =
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N` that causes the environment variable `NIX_BUILD_CORES` to be set
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to *N* when the builder is invoked. The builder can use this at its
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discretion to perform a parallel build, e.g., by calling `make -j
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N`. In Nixpkgs, this can be enabled on a per-package basis by
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setting the derivation attribute `enableParallelBuilding` to `true`.
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- `nix-store -q` now supports XML output through the `--xml` flag.
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- Several bug fixes.
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