From ee22c0344b7d303f6354296abadd17ac480404d5 Mon Sep 17 00:00:00 2001
From: Wouter Zwerink <35296208+wouterzwerink@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:09:26 +0100
Subject: [PATCH 1/5] Use CDumper whenever possible

---
 omegaconf/_utils.py | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/omegaconf/_utils.py b/omegaconf/_utils.py
index ec07aa51f..d3ba58de8 100644
--- a/omegaconf/_utils.py
+++ b/omegaconf/_utils.py
@@ -41,6 +41,13 @@
 except ImportError:  # pragma: no cover
     BaseLoader = yaml.SafeLoader
 
+try:
+    from yaml import CDumper
+
+    BaseDumper = CDumper
+except ImportError:  # pragma: no cover
+    BaseDumper = yaml.Dumper
+
 NoneType: Type[None] = type(None)
 
 BUILTIN_VALUE_TYPES: Tuple[Type[Any], ...] = (
@@ -105,11 +112,11 @@ def __repr__(self) -> str:
 _DEFAULT_MARKER_: Any = Marker("_DEFAULT_MARKER_")
 
 
-class OmegaConfDumper(yaml.Dumper):  # type: ignore
+class OmegaConfDumper(BaseDumper):  # type: ignore
     str_representer_added = False
 
     @staticmethod
-    def str_representer(dumper: yaml.Dumper, data: str) -> yaml.ScalarNode:
+    def str_representer(dumper: BaseDumper, data: str) -> yaml.ScalarNode:
         with_quotes = yaml_is_bool(data) or is_int(data) or is_float(data)
         return dumper.represent_scalar(
             yaml.resolver.BaseResolver.DEFAULT_SCALAR_TAG,

From fc33a80f78ef2d1a779cba93d27017a740b6cf7a Mon Sep 17 00:00:00 2001
From: Wouter Zwerink <35296208+wouterzwerink@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:12:13 +0100
Subject: [PATCH 2/5] Create 1152.feature

---
 news/1152.feature | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 news/1152.feature

diff --git a/news/1152.feature b/news/1152.feature
new file mode 100644
index 000000000..72aaff48c
--- /dev/null
+++ b/news/1152.feature
@@ -0,0 +1 @@
+The YAML dumper will now use `yaml.CDumper` instead of `yaml.Dumper` whenever possible to speed up dumping

From a9490a84e23ae2bf1647212b9a957e12bfb43a39 Mon Sep 17 00:00:00 2001
From: Wouter Zwerink <35296208+wouterzwerink@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:29:23 +0100
Subject: [PATCH 3/5] Attempt to make mypy happy

---
 omegaconf/_utils.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/omegaconf/_utils.py b/omegaconf/_utils.py
index d3ba58de8..ef34e951a 100644
--- a/omegaconf/_utils.py
+++ b/omegaconf/_utils.py
@@ -45,8 +45,10 @@
     from yaml import CDumper
 
     BaseDumper = CDumper
+    BaseDumperType: Type[CDumper] = type(CDumper)
 except ImportError:  # pragma: no cover
     BaseDumper = yaml.Dumper
+    BaseDumperType: Type[yaml.Dumper] = type(yaml.Dumper)
 
 NoneType: Type[None] = type(None)
 
@@ -112,11 +114,11 @@ def __repr__(self) -> str:
 _DEFAULT_MARKER_: Any = Marker("_DEFAULT_MARKER_")
 
 
-class OmegaConfDumper(BaseDumper):  # type: ignore
+class OmegaConfDumper(BaseDumperType):  # type: ignore
     str_representer_added = False
 
     @staticmethod
-    def str_representer(dumper: BaseDumper, data: str) -> yaml.ScalarNode:
+    def str_representer(dumper: BaseDumperType, data: str) -> yaml.ScalarNode:
         with_quotes = yaml_is_bool(data) or is_int(data) or is_float(data)
         return dumper.represent_scalar(
             yaml.resolver.BaseResolver.DEFAULT_SCALAR_TAG,

From 981cbb51cd817cf19d928825fe30d8d2f1b3111e Mon Sep 17 00:00:00 2001
From: Wouter Zwerink <35296208+wouterzwerink@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:41:57 +0100
Subject: [PATCH 4/5] Revert mistake

---
 omegaconf/_utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/omegaconf/_utils.py b/omegaconf/_utils.py
index ef34e951a..95942cc2a 100644
--- a/omegaconf/_utils.py
+++ b/omegaconf/_utils.py
@@ -114,7 +114,7 @@ def __repr__(self) -> str:
 _DEFAULT_MARKER_: Any = Marker("_DEFAULT_MARKER_")
 
 
-class OmegaConfDumper(BaseDumperType):  # type: ignore
+class OmegaConfDumper(BaseDumper):  # type: ignore
     str_representer_added = False
 
     @staticmethod

From 21b34e4cb9ee03a27b7805d63971738907c49d0e Mon Sep 17 00:00:00 2001
From: Wouter Zwerink <35296208+wouterzwerink@users.noreply.github.com>
Date: Wed, 17 Jan 2024 15:54:03 +0100
Subject: [PATCH 5/5] Simplify

---
 omegaconf/_utils.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/omegaconf/_utils.py b/omegaconf/_utils.py
index 95942cc2a..2575f0452 100644
--- a/omegaconf/_utils.py
+++ b/omegaconf/_utils.py
@@ -45,10 +45,8 @@
     from yaml import CDumper
 
     BaseDumper = CDumper
-    BaseDumperType: Type[CDumper] = type(CDumper)
 except ImportError:  # pragma: no cover
     BaseDumper = yaml.Dumper
-    BaseDumperType: Type[yaml.Dumper] = type(yaml.Dumper)
 
 NoneType: Type[None] = type(None)
 
@@ -118,7 +116,7 @@ class OmegaConfDumper(BaseDumper):  # type: ignore
     str_representer_added = False
 
     @staticmethod
-    def str_representer(dumper: BaseDumperType, data: str) -> yaml.ScalarNode:
+    def str_representer(dumper: yaml.Dumper, data: str) -> yaml.ScalarNode:
         with_quotes = yaml_is_bool(data) or is_int(data) or is_float(data)
         return dumper.represent_scalar(
             yaml.resolver.BaseResolver.DEFAULT_SCALAR_TAG,