Bug 1352815 - "codegen-units = 4" for Rust code in debug mode r=froydnj

MozReview-Commit-ID: IIFVmijY4B3

--HG--
extra : rebase_source : 1722dba55a1759f15b82532c13f1e61affd28e9b

python/mozbuild/mozbuild/frontend/emitter.py

@@ -475,7 +475,7 @@ class TreeMetadataEmitter(LoggingMixin):
                         'rpath': False,
                         'lto': False,
                         'debug-assertions': True,
-                        'codegen-units': 1,
+                        'codegen-units': 4,
                         'panic': 'abort',
                     }
                 else:

toolkit/library/gtest/rust/Cargo.toml

@@ -32,7 +32,7 @@ debug = true
 rpath = false
 lto = false
 debug-assertions = true
-codegen-units = 1
+codegen-units = 4
 panic = "abort"
 
 [profile.release]

toolkit/library/rust/Cargo.toml

@@ -30,7 +30,7 @@ debug = true
 rpath = false
 lto = false
 debug-assertions = true
-codegen-units = 1
+codegen-units = 4
 panic = "abort"
 
 [profile.release]