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authorBjörn Gustavsson <[email protected]>2018-10-03 13:43:51 +0200
committerGitHub <[email protected]>2018-10-03 13:43:51 +0200
commit5ecd1c97c033bfa26c38425269ca1146a002a2b6 (patch)
tree5f0221c48dd22efd7c6f0f99717314fb367f275b /lib
parentfd3674286e63b52cf941f0297b4c53cca18a5d28 (diff)
parent39c04c516bf728f93759ad50eb4ac2cf37727d2c (diff)
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Merge pull request #1972 from josevalim/jv-nospawn_process
Introduce the no_spawn_compiler_process option
Diffstat (limited to 'lib')
-rw-r--r--lib/compiler/doc/src/compile.xml11
-rw-r--r--lib/compiler/src/compile.erl7
-rw-r--r--lib/dialyzer/src/dialyzer_utils.erl2
3 files changed, 17 insertions, 3 deletions
diff --git a/lib/compiler/doc/src/compile.xml b/lib/compiler/doc/src/compile.xml
index 1a71c83521..f64986d55c 100644
--- a/lib/compiler/doc/src/compile.xml
+++ b/lib/compiler/doc/src/compile.xml
@@ -415,6 +415,17 @@ module.beam: module.erl \
is not documented, and can change between releases.</p>
</item>
+ <tag><c>no_spawn_compiler_process</c></tag>
+ <item>
+ <p>By default, all code is compiled in a separate process
+ which is terminated at the end of compilation. However,
+ some tools, like Dialyzer or compilers for other BEAM languages,
+ may already manage their own worker processes and spawning
+ an extra process may slow the compilation down.
+ In such scenarios, you can pass this option to stop the
+ compiler from spawning an additional process.</p>
+ </item>
+
<tag><c>no_strict_record_tests</c></tag>
<item>
<p>This option is not recommended.</p>
diff --git a/lib/compiler/src/compile.erl b/lib/compiler/src/compile.erl
index d894694c79..7a0531cb2b 100644
--- a/lib/compiler/src/compile.erl
+++ b/lib/compiler/src/compile.erl
@@ -210,8 +210,11 @@ do_compile(Input, Opts0) ->
{error,Reason}
end
end,
- %% Dialyzer has already spawned workers.
- case lists:member(dialyzer, Opts) of
+ %% Some tools, like Dialyzer, has already spawned workers
+ %% and spawning extra workers actually slow the compilation
+ %% down instead of speeding it up, so we provide a mechanism
+ %% to bypass the compiler process.
+ case lists:member(no_spawn_compiler_process, Opts) of
true ->
IntFun();
false ->
diff --git a/lib/dialyzer/src/dialyzer_utils.erl b/lib/dialyzer/src/dialyzer_utils.erl
index abd89034f3..ebe4040c34 100644
--- a/lib/dialyzer/src/dialyzer_utils.erl
+++ b/lib/dialyzer/src/dialyzer_utils.erl
@@ -643,7 +643,7 @@ sets_filter([Mod|Mods], ExpTypes) ->
src_compiler_opts() ->
[no_copt, to_core, binary, return_errors,
no_inline, strict_record_tests, strict_record_updates,
- dialyzer].
+ dialyzer, no_spawn_compiler_process].
-spec format_errors([{module(), string()}]) -> [string()].