tustvold commented on code in PR #4785:
URL: https://github.com/apache/arrow-rs/pull/4785#discussion_r1318324661


##########
arrow-json/src/reader/primitive_array.rs:
##########
@@ -57,19 +57,31 @@ primitive_parse!(i8, i16, i32, i64, u8, u16, u32, u64);
 
 impl ParseJsonNumber for f16 {
     fn parse(s: &[u8]) -> Option<Self> {
-        lexical_core::parse::<f32>(s).ok().map(f16::from_f32)
+        s.iter()
+            .map(|&b| b as char)
+            .collect::<String>()

Review Comment:
   The great irony there is serde_json is just using a vended version of 
lexical_core 😅



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