From c904ce3fdc37597741fe99b8eb28169974790ce4 Mon Sep 17 00:00:00 2001
From: nitely <ecastroborsani@gmail.com>
Date: Wed, 8 Oct 2025 16:29:03 -0300
Subject: [PATCH 1/2] Avoid write float alloc

---
 json_serialization/writer.nim | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/json_serialization/writer.nim b/json_serialization/writer.nim
index 4256771..5c23d9b 100644
--- a/json_serialization/writer.nim
+++ b/json_serialization/writer.nim
@@ -527,9 +527,7 @@ proc writeValue*[V: not void](w: var JsonWriter, value: V) {.raises: [IOError].}
   elif value is SomeFloat:
     autoSerializeCheck(Flavor, SomeFloat, typeof(value)):
       w.streamElement(s):
-        # TODO Implement writeText for floats
-        #      to avoid the allocation here:
-        s.write $value
+        s.writeText value
 
   elif value is seq or(value is distinct and distinctBase(value) is seq):
     autoSerializeCheck(Flavor, seq, typeof(value)):

From 92a24e8023202f9cc640f80f8bf55a010ea0ee8b Mon Sep 17 00:00:00 2001
From: nitely <ecastroborsani@gmail.com>
Date: Wed, 8 Oct 2025 19:14:16 -0300
Subject: [PATCH 2/2] test rountrip float

---
 tests/test_serialization.nim | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/test_serialization.nim b/tests/test_serialization.nim
index 52d4a80..1400255 100644
--- a/tests/test_serialization.nim
+++ b/tests/test_serialization.nim
@@ -376,6 +376,11 @@ suite "toJson tests":
       "".toJson == "\"\""
       "abc".toJson == "\"abc\""
 
+  test "float":
+    Json.roundtripTest 1.23, "1.23"
+    Json.roundtripTest 1.23'f32, "1.23"
+    Json.roundtripTest 1.23'f64, "1.23"
+
   test "enums":
     Json.roundtripTest x0, "\"x0\""
     Json.roundtripTest x1, "\"x1\""