Merge #1068

1068: profiling crate first draft r=matklad a=pasa

I've made this first draft for #961 
Could you look at it? Is this something what you are looking for?
It has lack of tests. I can't figure out how to test stderr output in rust right now. Do you have some clues?
Additionally I'm thinking about to implement procedural  macros to annotate methods with this profiler. Will it be helpful?



Co-authored-by: Sergey Parilin <[email protected]>

1 files changed, 10 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index ddd508b0a..06117ceaf 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -931,6 +931,7 @@ dependencies = [
  "ra_db 0.1.0",
  "ra_hir 0.1.0",
  "ra_ide_api 0.1.0",
+ "ra_prof 0.1.0",
  "ra_syntax 0.1.0",
  "tools 0.1.0",
 ]
@@ -970,6 +971,7 @@ dependencies = [
  "ra_arena 0.1.0",
  "ra_db 0.1.0",
  "ra_mbe 0.1.0",
+ "ra_prof 0.1.0",
  "ra_syntax 0.1.0",
  "ra_tt 0.1.0",
  "relative-path 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1018,6 +1020,7 @@ dependencies = [
  "parking_lot 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "ra_arena 0.1.0",
  "ra_ide_api 0.1.0",
+ "ra_prof 0.1.0",
  "ra_project_model 0.1.0",
  "ra_syntax 0.1.0",
  "ra_text_edit 0.1.0",
@@ -1051,6 +1054,13 @@ dependencies = [
 ]
 
 [[package]]
+name = "ra_prof"
+version = "0.1.0"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
 name = "ra_project_model"
 version = "0.1.0"
 dependencies = [