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| author | Johan Tibell <johan.tibell@gmail.com> | 2013-04-26 11:14:01 -0700 |
|---|---|---|
| committer | Johan Tibell <johan.tibell@gmail.com> | 2013-04-30 08:10:06 -0700 |
| commit | ade1ae97ed52c493ec415c1601dace39b64071dd (patch) | |
| tree | 131828007a85d5aa32b2d9302157dd58b7825c6c /docs | |
| parent | d75ca39b2ff8132dde6eb6aee946d75ba0a3f3ef (diff) | |
| download | haskell-ade1ae97ed52c493ec415c1601dace39b64071dd.tar.gz | |
Enable -funbox-small-strict-fields by default
The flag shows no real impact on nofib benchmarks and GHC itself,
which is expected given the small number of strict but not already
unpacked fields in the source of these programs. However, the flag
allows us to omit most of the UNPACK pragmas that are so common in
source code today.
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/using.xml | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/docs/users_guide/using.xml b/docs/users_guide/using.xml index be7e3da2ce..9c6fbf714a 100644 --- a/docs/users_guide/using.xml +++ b/docs/users_guide/using.xml @@ -1901,11 +1901,12 @@ f "2" = 2 <indexterm><primary>constructor fields, strict</primary></indexterm> </term> <listitem> - <para>This option causes all constructor fields which are - marked strict (i.e. “!”) and which - representation is smaller or equal to the size of a - pointer to be unpacked, if possible. It is equivalent to - adding an <literal>UNPACK</literal> pragma (see <xref + <para><emphasis>On by default.</emphasis>. This option + causes all constructor fields which are marked strict + (i.e. “!”) and which representation is smaller + or equal to the size of a pointer to be unpacked, if + possible. It is equivalent to adding an + <literal>UNPACK</literal> pragma (see <xref linkend="unpack-pragma"/>) to every strict constructor field that fulfils the size restriction. </para> |