The compiler freezing is mostly caused by a bug upstream,
but it may be speed up compilation to avoid purging as
we compile, as purging blocks the code server.
A potential downside is higher memory usage during
compilation.
Closes#13264.
The bitmap represents all non-divisible types.
Currently it implements all types in our system,
but atoms, lists, tuples, maps, and functions
will be given more precise types later on.
Dynamic has not been yet implemented nor
optimizations for term.
Module bodies, especially in tests, tend to be
long, which affects the performance of passes
such as beam_ssa_opt and beam_bool. This commit
disables those passes during module definition.
As an example, this makes loading Elixir's test
suite 7-8% faster.
Previously, the internal Elixir expansion pass worked directly on
Macro.Env. However, this poised an issue, if we want to track
more information in the pass, we ended up exposing it on
Macro.Env, making it larger, and potentially slowing down
operations such as __ENV__ serialization.
This commit refactors the expansion pass to work with two
structures, the Macro.Env struct and a #elixir_ex{} record.
Prior to this commit, compilation would copy the module map
(which is the map with the module definitions, attriubutes,
etc) multiple times. In particular, the module execution
process would pass it to the compiler. Then the module
execution process would send it to the parallel compiler
coordinator, which would pass it to the parallel checker
coordinator and then to each individual parallel checker.
That's four copies, which can be quite expensive since it
has the whole Elixir AST.
This commit makes it so it is copied only once. The map
is assembled inside the compiler process and then copied
to the checker process.
This has yielded good improvements in Elixir's test suite.
Before:
Finished in 27.3 seconds (14.4s on load, 7.0s async, 5.8s sync)
After:
Finished in 22.0 seconds (9.4s on load, 6.7s async, 5.8s sync)
We also improve error messages to list all
available fields and introduce Module.Types.Of
module to hold shared functionality between Expr
and Pattern.
If there is a compile error, Kernel.ParallelCompiler raises
`** (UndefinedFunctionError) function List.Chars.to_charlist/1 is
undefined (module List.Chars is not available)`.
Before this patch, we could have slightly different
AST while compiling modules in parallel, depending
if modules were recompiled or not. Now we always
recompile Kernel before compiling the whole stdlib.
We used this opportunity to simplify bootstrap by
breaking it two steps. The first step is the minimal
necessary to compile Kernel itself. The second step
contains the whole compiler.
Closes#10000.
José Valim
José Valim
Jonatan Männchen
Jonatan Kłosko
sabiwara
Marc-André Lafortune
Eksperimental
Fernando Tapia Rico
Michał Łępicki
Eric Meadows-Jönsson
Wojtek Mach
José Valim