Improve performance of String and Vec<u8>

borsh-rs/borsh-derive-internal/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "borsh-derive-internal"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Near Inc <hello@nearprotocol.com>"]
 edition = "2018"
 license = "Apache-2.0"

borsh-rs/borsh-derive-internal/src/enum_de.rs

@@ -64,7 +64,7 @@ pub fn enum_de(input: &ItemEnum) -> syn::Result<TokenStream2> {
     if let Some(method_ident) = init_method {
         Ok(quote! {
             impl #generics borsh::de::BorshDeserialize for #name #generics where  #deserializable_field_types {
-                fn deserialize<R: std::io::Read>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
+                fn deserialize<R: std::io::BufRead>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
                     #variant_idx
                     let mut return_value = match variant_idx {
                         #variant_arms
@@ -82,7 +82,7 @@ pub fn enum_de(input: &ItemEnum) -> syn::Result<TokenStream2> {
     } else {
         Ok(quote! {
             impl #generics borsh::de::BorshDeserialize for #name #generics where  #deserializable_field_types {
-                fn deserialize<R: std::io::Read>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
+                fn deserialize<R: std::io::BufRead>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
                     #variant_idx
                     let return_value = match variant_idx {
                         #variant_arms

borsh-rs/borsh-derive-internal/src/struct_de.rs

@@ -54,7 +54,7 @@ pub fn struct_de(input: &ItemStruct) -> syn::Result<TokenStream2> {
     if let Some(method_ident) = init_method {
         Ok(quote! {
             impl #generics borsh::de::BorshDeserialize for #name #generics where #deserializable_field_types {
-                fn deserialize<R: std::io::Read>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
+                fn deserialize<R: std::io::BufRead>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
                     let mut return_value = #return_value;
                     return_value.#method_ident();
                     Ok(return_value)
@@ -64,7 +64,7 @@ pub fn struct_de(input: &ItemStruct) -> syn::Result<TokenStream2> {
     } else {
         Ok(quote! {
             impl #generics borsh::de::BorshDeserialize for #name #generics where #deserializable_field_types {
-                fn deserialize<R: std::io::Read>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
+                fn deserialize<R: std::io::BufRead>(reader: &mut R) -> std::result::Result<Self, std::io::Error> {
                     Ok(#return_value)
                 }
             }

borsh-rs/borsh-derive/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "borsh-derive"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Near Inc <hello@nearprotocol.com>"]
 edition = "2018"
 license = "Apache-2.0"
@@ -16,7 +16,7 @@ Binary Object Representation Serializer for Hashing
 proc-macro = true
 
 [dependencies]
-borsh-derive-internal = { path = "../borsh-derive-internal" , version="0.5.0"}
-borsh-schema-derive-internal = { path = "../borsh-schema-derive-internal" , version="0.5.0"}
+borsh-derive-internal = { path = "../borsh-derive-internal" , version="0.6.0"}
+borsh-schema-derive-internal = { path = "../borsh-schema-derive-internal" , version="0.6.0"}
 syn = {version = "1", features = ["full", "fold"] }
 

borsh-rs/borsh-schema-derive-internal/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "borsh-schema-derive-internal"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Near Inc <hello@nearprotocol.com>"]
 edition = "2018"
 license = "Apache-2.0"

borsh-rs/borsh/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "borsh"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Near Inc <hello@nearprotocol.com>"]
 edition = "2018"
 license = "Apache-2.0"
@@ -21,7 +21,7 @@ name = "generate_schema_schema"
 path = "src/generate_schema_schema.rs"
 
 [dependencies]
-borsh-derive = { path = "../borsh-derive", version = "0.5.0" }
+borsh-derive = { path = "../borsh-derive", version = "0.6.0" }
 
 [features]
 default = ["std"]

borsh-rs/borsh/src/de/hint.rs

@@ -3,3 +3,13 @@ pub fn cautious<T>(hint: u32) -> usize {
     let el_size = std::mem::size_of::<T>() as u32;
     std::cmp::max(std::cmp::min(hint, 4096/el_size), 1u32) as _
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    pub fn test_cautious_u8() {
+        assert_eq!(cautious::<u8>(10), 10);
+    }
+}