diff --git a/Cargo.toml b/Cargo.toml
index b421b18..97bcc41 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,12 +6,15 @@ edition = "2021"
 publish = false
 
 [dependencies]
+
 getopts = "0.2"
 jemallocator = "0.5"
 rustc-serialize = { version = "0.3", optional = true }
 serde = { version = "1.0", features = ["derive"], optional = true }
 serde_json = { version = "1.0", optional = true }
-simd-json = { version = "0.12", optional = true }
+time = "0.3"
+simd-json = { version = "0.13", optional = true }
+simd-json-derive = { version = "0.13", optional = true }
 
 [features]
 default = ["performance", "all-libs", "all-files"]
@@ -19,7 +22,7 @@ all-libs = ["lib-serde", "lib-rustc-serialize", "lib-simd-json"]
 all-files = ["file-canada", "file-citm-catalog", "file-twitter"]
 performance = ["parse-dom", "stringify-dom", "parse-struct", "stringify-struct"]
 lib-serde = ["serde", "serde_json"]
-lib-simd-json = ["serde", "simd-json"]
+lib-simd-json = ["serde", "simd-json", "simd-json-derive"]
 lib-rustc-serialize = ["rustc-serialize"]
 file-canada = []
 file-citm-catalog = []
diff --git a/README.md b/README.md
index 1d9b97f..893218a 100644
--- a/README.md
+++ b/README.md
@@ -5,12 +5,12 @@ are:
 
 - [serde\_json] 1.0.72
 - [rustc-serialize] 0.3.24
-- [simd-json] 0.4.11 (this requires a modern x86 CPU for good results)
+- [simd-json] 0.7.0 (this requires a modern x86 CPU for good results)
 
 [nativejson-benchmark]: https://github.com/miloyip/nativejson-benchmark
 [serde\_json]: https://github.com/serde-rs/json
 [rustc-serialize]: https://github.com/rust-lang-nursery/rustc-serialize
-[simd-json]: https://github.com/Licenser/simdjson-rs
+[simd-json]: https://github.com/simd-lite/simd-json
 
 #### `$ cargo run --release`
 
diff --git a/src/canada.rs b/src/canada.rs
index d1114c7..d2aec7e 100644
--- a/src/canada.rs
+++ b/src/canada.rs
@@ -6,26 +6,56 @@ use std::collections::BTreeMap as Map;
 pub type Canada = FeatureCollection;
 
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct FeatureCollection {
-    #[cfg_attr(feature = "serde", serde(rename = "type"))]
+    #[cfg_attr(
+        any(feature = "serde", feature = "lib-simd-json"),
+        serde(rename = "type")
+    )]
     pub obj_type: ObjType,
     pub features: Vec<Feature>,
 }
 
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Feature {
-    #[cfg_attr(feature = "serde", serde(rename = "type"))]
+    #[cfg_attr(
+        any(feature = "serde", feature = "lib-simd-json"),
+        serde(rename = "type")
+    )]
     pub obj_type: ObjType,
     pub properties: Map<String, String>,
     pub geometry: Geometry,
 }
 
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Geometry {
-    #[cfg_attr(feature = "serde", serde(rename = "type"))]
+    #[cfg_attr(
+        any(feature = "serde", feature = "lib-simd-json"),
+        serde(rename = "type")
+    )]
     pub obj_type: ObjType,
     pub coordinates: Vec<Vec<(Latitude, Longitude)>>,
 }
diff --git a/src/color.rs b/src/color.rs
index ffcf22e..46d03bf 100644
--- a/src/color.rs
+++ b/src/color.rs
@@ -12,7 +12,7 @@ use serde::de::{self, Deserialize, Deserializer, Unexpected};
 #[cfg(feature = "serde")]
 use serde::ser::{Serialize, Serializer};
 
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, Debug)]
 pub struct Color(u32);
 
 #[cfg(any(feature = "serde", feature = "lib-rustc-serialize"))]
@@ -58,6 +58,17 @@ impl Serialize for Color {
     }
 }
 
+#[cfg(feature = "lib-simd-json")]
+impl simd_json_derive::Serialize for Color {
+    fn json_write<W>(&self, writer: &mut W) -> std::io::Result<()>
+    where
+        W: std::io::Write,
+    {
+        let mut buf = MaybeUninit::uninit();
+        self.as_str(&mut buf).json_write(writer)
+    }
+}
+
 #[cfg(feature = "serde")]
 impl<'de> Deserialize<'de> for Color {
     fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
@@ -88,6 +99,29 @@ impl<'de> Deserialize<'de> for Color {
     }
 }
 
+#[cfg(feature = "lib-simd-json")]
+impl<'input> ::simd_json_derive::Deserialize<'input> for Color {
+    #[inline]
+    fn from_tape(tape: &mut ::simd_json_derive::Tape<'input>) -> simd_json::Result<Self>
+    where
+        Self: std::marker::Sized + 'input,
+    {
+        if let Some(::simd_json::Node::String(s)) = tape.next() {
+            if let Ok(hex) = u32::from_str_radix(s, 16) {
+                Ok(Color(hex))
+            } else {
+                dbg!(Err(::simd_json::Error::generic(
+                    simd_json::ErrorType::ExpectedString,
+                )))
+            }
+        } else {
+            dbg!(Err(::simd_json::Error::generic(
+                simd_json::ErrorType::ExpectedString,
+            )))
+        }
+    }
+}
+
 #[cfg(feature = "lib-rustc-serialize")]
 impl Encodable for Color {
     fn encode<S>(&self, s: &mut S) -> Result<(), S::Error>
diff --git a/src/copy/citm_catalog.rs b/src/copy/citm_catalog.rs
index 48045ef..19e8355 100644
--- a/src/copy/citm_catalog.rs
+++ b/src/copy/citm_catalog.rs
@@ -6,11 +6,18 @@ use std::collections::BTreeMap as Map;
 use crate::empty;
 use crate::prim_str::PrimStr;
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct CitmCatalog {
     pub area_names: Map<IdStr, String>,
     pub audience_sub_category_names: Map<IdStr, String>,
@@ -28,11 +35,18 @@ pub struct CitmCatalog {
 pub type Id = u32;
 pub type IdStr = PrimStr<u32>;
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Event {
     pub description: (),
     pub id: Id,
@@ -44,11 +58,18 @@ pub struct Event {
     pub topic_ids: Vec<Id>,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Performance {
     pub event_id: Id,
     pub id: Id,
@@ -61,32 +82,53 @@ pub struct Performance {
     pub venue_code: String,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Price {
     pub amount: u32,
     pub audience_sub_category_id: Id,
     pub seat_category_id: Id,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct SeatCategory {
     pub areas: Vec<Area>,
     pub seat_category_id: Id,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 #[cfg_attr(
-    feature = "serde",
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
     serde(deny_unknown_fields, rename_all = "camelCase")
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Area {
     pub area_id: Id,
     pub block_ids: empty::Array,
diff --git a/src/copy/twitter.rs b/src/copy/twitter.rs
index fec8f68..1cd5fb3 100644
--- a/src/copy/twitter.rs
+++ b/src/copy/twitter.rs
@@ -7,12 +7,22 @@ use crate::color::Color;
 use crate::empty;
 use crate::prim_str::PrimStr;
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Twitter {
     pub statuses: Vec<Status>,
     pub search_metadata: SearchMetadata,
@@ -23,12 +33,22 @@ pub type ShortId = u32;
 pub type LongIdStr = PrimStr<LongId>;
 pub type ShortIdStr = PrimStr<ShortId>;
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Status {
     pub metadata: Metadata,
     pub created_at: String,
@@ -57,23 +77,43 @@ pub struct Status {
     pub lang: LanguageCode,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Metadata {
     pub result_type: ResultType,
     pub iso_language_code: LanguageCode,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct User {
     pub id: ShortId,
     pub id_str: ShortIdStr,
@@ -117,33 +157,63 @@ pub struct User {
     pub notifications: bool,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct UserEntities {
     pub url: Option<UserUrl>,
     pub description: UserEntitiesDescription,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct UserUrl {
     pub urls: Vec<Url>,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Url {
     pub url: String,
     pub expanded_url: String,
@@ -151,22 +221,42 @@ pub struct Url {
     pub indices: Indices,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct UserEntitiesDescription {
     pub urls: Vec<Url>,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct StatusEntities {
     pub hashtags: Vec<Hashtag>,
     pub symbols: empty::Array,
@@ -175,23 +265,43 @@ pub struct StatusEntities {
     pub media: Option<Vec<Media>>,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Hashtag {
     pub text: String,
     pub indices: Indices,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct UserMention {
     pub screen_name: String,
     pub name: String,
@@ -200,8 +310,18 @@ pub struct UserMention {
     pub indices: Indices,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Media {
     pub id: LongId,
     pub id_str: LongIdStr,
@@ -211,19 +331,32 @@ pub struct Media {
     pub url: String,
     pub display_url: String,
     pub expanded_url: String,
-    #[cfg_attr(feature = "serde", serde(rename = "type"))]
+    #[cfg_attr(
+        any(feature = "serde", feature = "lib-simd-json"),
+        serde(rename = "type")
+    )]
     pub media_type: String,
     pub sizes: Sizes,
     pub source_status_id: Option<LongId>,
     pub source_status_id_str: Option<LongIdStr>,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Sizes {
     pub medium: Size,
     pub small: Size,
@@ -231,12 +364,22 @@ pub struct Sizes {
     pub large: Size,
 }
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct Size {
     pub w: u16,
     pub h: u16,
@@ -245,12 +388,22 @@ pub struct Size {
 
 pub type Indices = (u8, u8);
 
-#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
-#[cfg_attr(feature = "serde", serde(deny_unknown_fields))]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    derive(Serialize, Deserialize)
+)]
+#[cfg_attr(
+    any(feature = "serde", feature = "lib-simd-json"),
+    serde(deny_unknown_fields)
+)]
 #[cfg_attr(
     feature = "lib-rustc-serialize",
     derive(RustcEncodable, RustcDecodable)
 )]
+#[cfg_attr(
+    feature = "lib-simd-json",
+    derive(simd_json_derive::Serialize, simd_json_derive::Deserialize)
+)]
 pub struct SearchMetadata {
     pub completed_in: f32,
     pub max_id: LongId,
diff --git a/src/empty.rs b/src/empty.rs
index 59ed200..c0b8d1d 100644
--- a/src/empty.rs
+++ b/src/empty.rs
@@ -45,6 +45,32 @@ impl<'de> Deserialize<'de> for Array {
     }
 }
 
+#[cfg(feature = "lib-simd-json")]
+impl simd_json_derive::Serialize for Array {
+    fn json_write<W>(&self, writer: &mut W) -> std::io::Result<()>
+    where
+        W: std::io::Write,
+    {
+        writer.write_all(b"[]")
+    }
+}
+
+impl<'input> simd_json_derive::Deserialize<'input> for Array {
+    #[inline]
+    fn from_tape(tape: &mut simd_json_derive::Tape<'input>) -> simd_json::Result<Self>
+    where
+        Self: std::marker::Sized + 'input,
+    {
+        if let Some(simd_json::Node::Array { len: 0, .. }) = tape.next() {
+            Ok(Self)
+        } else {
+            Err(simd_json::Error::generic(
+                simd_json::ErrorType::ExpectedArray,
+            ))
+        }
+    }
+}
+
 #[cfg(feature = "lib-rustc-serialize")]
 impl Encodable for Array {
     fn encode<S>(&self, s: &mut S) -> Result<(), S::Error>
diff --git a/src/enums.rs b/src/enums.rs
index 856b738..a97f876 100644
--- a/src/enums.rs
+++ b/src/enums.rs
@@ -1,12 +1,12 @@
 #[macro_export]
 macro_rules! enum_str {
     ($name:ident { $($variant:ident($str:expr), )* }) => {
-        #[derive(Clone, Copy)]
+        #[derive(Clone, Copy, Debug)]
         pub enum $name {
             $($variant,)*
         }
 
-        #[cfg(any(feature = "serde", feature = "lib-rustc-serialize"))]
+        #[cfg(any(feature = "lib-simd-json", feature = "lib-serde", feature = "lib-rustc-serialize"))]
         impl $name {
             fn as_str(self) -> &'static str {
                 match self {
@@ -52,6 +52,40 @@ macro_rules! enum_str {
             }
         }
 
+        #[cfg(feature = "lib-simd-json")]
+        impl ::simd_json_derive::Serialize for $name {
+            #[inline]
+            fn json_write<W>(&self, writer: &mut W) -> std::io::Result<()>
+                where W: std::io::Write
+            {
+                self.as_str().json_write(writer)
+            }
+        }
+
+        #[cfg(feature = "lib-simd-json")]
+        impl<'input> ::simd_json_derive::Deserialize<'input> for $name {
+            #[inline]
+            fn from_tape(tape: &mut ::simd_json_derive::Tape<'input>) -> simd_json::Result<Self>
+            where
+                Self: std::marker::Sized + 'input,
+            {
+                if let Some(::simd_json::Node::String(s)) = tape.next() {
+                    match s {
+                        $( $str => Ok($name::$variant), )*
+                        _ => Err(::simd_json::Error::generic(
+                            simd_json::ErrorType::ExpectedString,
+                        )),
+                    }
+
+                } else {
+                    Err(::simd_json::Error::generic(
+                        simd_json::ErrorType::ExpectedString,
+                    ))
+                }
+            }
+        }
+
+
         #[cfg(feature = "lib-rustc-serialize")]
         impl ::rustc_serialize::Encodable for $name {
             fn encode<S>(&self, s: &mut S) -> Result<(), S::Error>
diff --git a/src/main.rs b/src/main.rs
index 4cd8c65..db495a0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -131,7 +131,9 @@ macro_rules! bench_file_simd_json {
         path: $path:expr,
         structure: $structure:ty,
     } => {
+
         let num_trials = num_trials().unwrap_or(256);
+        let mut buffers = simd_json::Buffers::new(4096);
 
         print!("{:22}", $path);
         io::stdout().flush().unwrap();
@@ -150,7 +152,7 @@ macro_rules! bench_file_simd_json {
             for _ in 0..num_trials {
                 data.as_mut_slice().clone_from_slice(contents.as_slice());
                 let mut timer = benchmark.start();
-                let _parsed = simd_json_parse_dom(&mut data).unwrap();
+                let _parsed = simd_json_parse_dom(&mut data, &mut buffers).unwrap();
                 timer.stop();
             }
             let dur = benchmark.min_elapsed();
@@ -164,12 +166,12 @@ macro_rules! bench_file_simd_json {
         {
             let len = contents.len();
             let mut data = contents.clone();
-            let dom = simd_json_parse_dom(&mut data).unwrap();
+            let dom = simd_json_parse_dom(&mut data, &mut buffers).unwrap();
             let dur = timer::bench_with_buf(num_trials, len, |out| {
-                simd_json::Writable::write(&dom, out).unwrap()
+                simd_json::prelude::Writable::write(&dom, out).unwrap()
             });
             let mut serialized = Vec::new();
-            simd_json::Writable::write(&dom, &mut serialized).unwrap();
+            simd_json::prelude::Writable::write(&dom, &mut serialized).unwrap();
             print!("{:6} MB/s", throughput(dur, serialized.len()));
             io::stdout().flush().unwrap();
         }
@@ -184,7 +186,7 @@ macro_rules! bench_file_simd_json {
             for _ in 0..num_trials {
                 data.as_mut_slice().clone_from_slice(contents.as_slice());
                 let mut timer = benchmark.start();
-                let _parsed: $structure = simd_json_parse_struct(&mut data).unwrap();
+                let _parsed: $structure = simd_json_parse_struct(&mut data, &mut buffers).unwrap();
                 timer.stop();
             }
             let dur = benchmark.min_elapsed();
@@ -192,6 +194,22 @@ macro_rules! bench_file_simd_json {
             io::stdout().flush().unwrap();
         }
 
+        #[cfg(feature = "stringify-struct")]
+        {
+            use simd_json_derive::Serialize;
+            let len = contents.len();
+            let mut data = contents.clone();
+            let parsed: $structure = simd_json_parse_struct(&mut data, &mut buffers).unwrap();
+            let dur = timer::bench_with_buf(num_trials, len, |out| {
+                parsed.json_write(out).unwrap();
+            });
+            let mut serialized = Vec::new();
+            parsed.json_write(&mut serialized).unwrap();
+
+            print!("{:6} MB/s", throughput(dur, serialized.len()));
+            io::stdout().flush().unwrap();
+        }
+
         println!();
     }
 }
@@ -292,17 +310,34 @@ where
     feature = "lib-simd-json",
     any(feature = "parse-dom", feature = "stringify-dom")
 ))]
-fn simd_json_parse_dom(bytes: &mut [u8]) -> simd_json::Result<simd_json::BorrowedValue> {
-    simd_json::to_borrowed_value(bytes)
+fn simd_json_parse_dom<'input>(
+    bytes: &'input mut [u8],
+    buffers: &mut simd_json::Buffers,
+) -> simd_json::Result<simd_json::BorrowedValue<'input>> {
+    simd_json::to_borrowed_value_with_buffers(bytes, buffers)
 }
 
+// #[cfg(all(
+//     feature = "lib-simd-json",
+//     any(feature = "parse-struct", feature = "stringify-struct")
+// ))]
+// fn simd_json_parse_struct<'de, T>(bytes: &'de mut [u8]) -> simd_json::Result<T>
+// where
+//     T: serde::Deserialize<'de>,
+// {
+//     simd_json::serde::from_slice(bytes)
+// }
+
 #[cfg(all(
     feature = "lib-simd-json",
     any(feature = "parse-struct", feature = "stringify-struct")
 ))]
-fn simd_json_parse_struct<'de, T>(bytes: &'de mut [u8]) -> simd_json::Result<T>
+fn simd_json_parse_struct<'de, T>(
+    bytes: &'de mut [u8],
+    buffers: &mut simd_json::Buffers,
+) -> simd_json::Result<T>
 where
-    T: serde::Deserialize<'de>,
+    T: simd_json_derive::Deserialize<'de> + 'de,
 {
-    simd_json::serde::from_slice(bytes)
+    T::from_slice_with_buffers(bytes, buffers)
 }
diff --git a/src/prim_str.rs b/src/prim_str.rs
index 6d34daf..79b5d6e 100644
--- a/src/prim_str.rs
+++ b/src/prim_str.rs
@@ -65,6 +65,53 @@ where
     }
 }
 
+#[cfg(feature = "lib-simd-json")]
+impl<T> simd_json_derive::Serialize for PrimStr<T>
+where
+    T: Copy + Ord + Display + FromStr,
+{
+    fn json_write<W>(&self, writer: &mut W) -> std::io::Result<()>
+    where
+        W: std::io::Write,
+    {
+        write!(writer, r#""{}""#, self.0)
+    }
+}
+
+#[cfg(feature = "lib-simd-json")]
+impl<T> simd_json_derive::SerializeAsKey for PrimStr<T>
+where
+    T: Copy + Ord + Display + FromStr,
+{
+    fn json_write<W>(&self, writer: &mut W) -> std::io::Result<()>
+    where
+        W: std::io::Write,
+    {
+        write!(writer, r#""{}""#, self.0)
+    }
+}
+
+impl<'input, T> simd_json_derive::Deserialize<'input> for PrimStr<T>
+where
+    T: Copy + Ord + Display + FromStr,
+{
+    #[inline]
+    fn from_tape(tape: &mut simd_json_derive::Tape<'input>) -> simd_json::Result<Self>
+    where
+        Self: std::marker::Sized + 'input,
+    {
+        if let Some(simd_json::Node::String(s)) = tape.next() {
+            Ok(PrimStr(FromStr::from_str(s).map_err(|_e| {
+                simd_json::Error::generic(simd_json::ErrorType::Serde("not a number".into()))
+            })?))
+        } else {
+            Err(simd_json::Error::generic(
+                simd_json::ErrorType::ExpectedNull,
+            ))
+        }
+    }
+}
+
 #[cfg(feature = "lib-rustc-serialize")]
 impl<T> Encodable for PrimStr<T>
 where