Issue #26719: More efficient formatting of ints and floats in json.

1 files changed, 10 insertions, 10 deletions

diff --git a/Lib/json/encoder.py b/Lib/json/encoder.py
index 26e9eb2..d596489 100644
--- a/Lib/json/encoder.py
+++ b/Lib/json/encoder.py
@@ -32,7 +32,6 @@ for i in range(0x20):
     #ESCAPE_DCT.setdefault(chr(i), '\\u%04x' % (i,))
 
 INFINITY = float('inf')
-FLOAT_REPR = repr
 
 def py_encode_basestring(s):
     """Return a JSON representation of a Python string
@@ -221,7 +220,7 @@ class JSONEncoder(object):
             _encoder = encode_basestring
 
         def floatstr(o, allow_nan=self.allow_nan,
-                _repr=FLOAT_REPR, _inf=INFINITY, _neginf=-INFINITY):
+                _repr=float.__repr__, _inf=INFINITY, _neginf=-INFINITY):
             # Check for specials.  Note that this type of test is processor
             # and/or platform-specific, so do tests which don't depend on the
             # internals.
@@ -268,6 +267,7 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
         list=list,
         str=str,
         tuple=tuple,
+        _intstr=int.__str__,
     ):
 
     if _indent is not None and not isinstance(_indent, str):
@@ -309,10 +309,10 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
                 # Subclasses of int/float may override __str__, but we still
                 # want to encode them as integers/floats in JSON. One example
                 # within the standard library is IntEnum.
-                yield buf + str(int(value))
+                yield buf + _intstr(value)
             elif isinstance(value, float):
                 # see comment above for int
-                yield buf + _floatstr(float(value))
+                yield buf + _floatstr(value)
             else:
                 yield buf
                 if isinstance(value, (list, tuple)):
@@ -359,7 +359,7 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
             # also allow them.  Many encoders seem to do something like this.
             elif isinstance(key, float):
                 # see comment for int/float in _make_iterencode
-                key = _floatstr(float(key))
+                key = _floatstr(key)
             elif key is True:
                 key = 'true'
             elif key is False:
@@ -368,7 +368,7 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
                 key = 'null'
             elif isinstance(key, int):
                 # see comment for int/float in _make_iterencode
-                key = str(int(key))
+                key = _intstr(key)
             elif _skipkeys:
                 continue
             else:
@@ -389,10 +389,10 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
                 yield 'false'
             elif isinstance(value, int):
                 # see comment for int/float in _make_iterencode
-                yield str(int(value))
+                yield _intstr(value)
             elif isinstance(value, float):
                 # see comment for int/float in _make_iterencode
-                yield _floatstr(float(value))
+                yield _floatstr(value)
             else:
                 if isinstance(value, (list, tuple)):
                     chunks = _iterencode_list(value, _current_indent_level)
@@ -419,10 +419,10 @@ def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
             yield 'false'
         elif isinstance(o, int):
             # see comment for int/float in _make_iterencode
-            yield str(int(o))
+            yield _intstr(o)
         elif isinstance(o, float):
             # see comment for int/float in _make_iterencode
-            yield _floatstr(float(o))
+            yield _floatstr(o)
         elif isinstance(o, (list, tuple)):
             yield from _iterencode_list(o, _current_indent_level)
         elif isinstance(o, dict):