diff --git a/README.md b/README.md
index a1e6b54..a546718 100644
--- a/README.md
+++ b/README.md
@@ -57,13 +57,14 @@ To run the tests, you'll need to install:
 
 * [Cap'n Proto](https://capnproto.org/)
 * [Protocol Buffers](https://developers.google.com/protocol-buffers/?hl=en)
+* [FlatBuffers](https://google.github.io/flatbuffers)
 * [Go](https://golang.org/)
 * [Rust](https://rust-lang.org/)
 
 On OS X and [Homebrew](http://brew.sh/), this can all be done with:
 
 ```
-brew install capnp protobuf rust go
+brew install capnp protobuf flatbuffers rust go
 ```
 
 I'm not yet sure what's needed for other operating systems. Once that is
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index d92c09a..a4f4711 100644
--- a/rust/Cargo.lock
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 name = "serde_derive"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
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 dependencies = [
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 ]
 
 [[package]]
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+ "serde",
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 [[package]]
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 ]
 
 [[package]]
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 dependencies = [
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 [[package]]
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 [[package]]
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 [[package]]
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 dependencies = [
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 [[package]]
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+[[package]]
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+[[package]]
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+dependencies = [
+ "libc",
+ "thiserror",
+]
 
 [[package]]
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+checksum = "92c1eb33641e276cfa214a0522acad57be5c56b10cb348b3c5117db75f3ac4b0"
 dependencies = [
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- "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
 ]
 
 [[package]]
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 source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
 [[package]]
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-
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+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 5ab9544..70ce671 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -10,13 +10,14 @@ flatc-rust = "0.1"
 protoc-rust = "2.0"
 
 [dependencies]
-bincode = "1.0"
+bincode = "1.3"
 capnp = "0.9"
 flatbuffers = "0.5"
 num-derive = "0.2"
 num-traits = "0.2"
-protobuf = "2.0"
-rmp-serde = "0.13"
+protobuf = "2.18"
+rmp-serde = "0.15.0"
+rmpv = { "version" = "0.4.6", "features" = ["with-serde"] }
 serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
diff --git a/rust/benches/bench.rs b/rust/benches/bench.rs
index ee0cbb6..9ae46ea 100644
--- a/rust/benches/bench.rs
+++ b/rust/benches/bench.rs
@@ -4,6 +4,7 @@ extern crate capnp;
 extern crate flatbuffers;
 extern crate protobuf;
 extern crate rmp_serde;
+extern crate rmpv;
 extern crate rust_serde_benchmarks;
 extern crate serde;
 extern crate serde_json;
@@ -11,8 +12,10 @@ extern crate test;
 
 use capnp::message::{Builder, ReaderOptions};
 use protobuf::{Clear, Message};
-use rust_serde_benchmarks::{log_capnp, log_proto, log_flatbuffers, protocol_capnp, protocol_protobuf, protocol_flatbuffers, Log};
-use serde::{Deserialize, Serialize};
+use rust_serde_benchmarks::{
+    log_capnp, log_flatbuffers, log_proto, protocol_capnp, protocol_flatbuffers, protocol_protobuf,
+    Log,
+};
 use test::Bencher;
 
 #[bench]
@@ -53,6 +56,21 @@ fn serde_json_serialize(b: &mut Bencher) {
     });
 }
 
+#[bench]
+fn serde_json_serialize_dynamic(b: &mut Bencher) {
+    let log = Log::new();
+    let mut buf = Vec::new();
+
+    serde_json::to_writer(&mut buf, &log).unwrap();
+    b.bytes = buf.len() as u64;
+    let val: serde_json::Value = serde_json::from_slice(&buf).unwrap();
+
+    b.iter(|| {
+        buf.clear();
+        serde_json::to_writer(&mut buf, &val).unwrap();
+    });
+}
+
 #[bench]
 fn serde_json_deserialize(b: &mut Bencher) {
     let log = Log::new();
@@ -63,6 +81,16 @@ fn serde_json_deserialize(b: &mut Bencher) {
     b.iter(|| serde_json::from_str::<Log>(&json).unwrap());
 }
 
+#[bench]
+fn serde_json_deserialize_dynamic(b: &mut Bencher) {
+    let log = Log::new();
+    let json = serde_json::to_string(&log).unwrap();
+
+    b.bytes = json.len() as u64;
+
+    b.iter(|| serde_json::from_str::<serde_json::Value>(&json).unwrap());
+}
+
 #[bench]
 fn capnp_populate(b: &mut Bencher) {
     let mut msg = Builder::new_default();
@@ -167,9 +195,7 @@ fn flatbuffers_serialize(b: &mut Bencher) {
     let buf = msg.finished_data();
     b.bytes = buf.len() as u64;
 
-    b.iter(|| {
-        msg.finished_data()
-    });
+    b.iter(|| msg.finished_data());
 }
 
 #[bench]
@@ -181,24 +207,36 @@ fn flatbuffers_deserialize(b: &mut Bencher) {
     let buf = msg.finished_data();
     b.bytes = buf.len() as u64;
 
+    b.iter(|| log_flatbuffers::get_root_as_log(&buf));
+}
+
+#[bench]
+fn rmp_serde_serialize(b: &mut Bencher) {
+    let mut buf = Vec::new();
+    let log = Log::new();
+
+    rmp_serde::encode::write(&mut buf, &log).unwrap();
+    b.bytes = buf.len() as u64;
+
     b.iter(|| {
-        log_flatbuffers::get_root_as_log(&buf)
+        buf.clear();
+        rmp_serde::encode::write(&mut buf, &log).unwrap();
     });
 }
 
 #[bench]
-fn rmp_serde_serialize(b: &mut Bencher) {
+fn rmp_serde_serialize_dynamic(b: &mut Bencher) {
     let mut buf = Vec::new();
     let log = Log::new();
 
-    log.serialize(&mut ::rmp_serde::Serializer::new(&mut buf))
-        .unwrap();
+    rmp_serde::encode::write(&mut buf, &log).unwrap();
     b.bytes = buf.len() as u64;
 
+    let val: rmpv::Value = rmp_serde::from_read_ref(&buf).unwrap();
+
     b.iter(|| {
         buf.clear();
-        log.serialize(&mut ::rmp_serde::Serializer::new(&mut buf))
-            .unwrap();
+        rmp_serde::encode::write(&mut buf, &val).unwrap();
     });
 }
 
@@ -206,13 +244,24 @@ fn rmp_serde_serialize(b: &mut Bencher) {
 fn rmp_serde_deserialize(b: &mut Bencher) {
     let mut buf = Vec::new();
     let log = Log::new();
-    log.serialize(&mut ::rmp_serde::Serializer::new(&mut buf))
-        .unwrap();
+    rmp_serde::encode::write(&mut buf, &log).unwrap();
+    b.bytes = buf.len() as u64;
+
+    b.iter(|| {
+        let _log: Log = rmp_serde::from_read_ref(&buf).unwrap();
+    });
+}
+
+#[bench]
+fn rmp_serde_deserialize_dynamic(b: &mut Bencher) {
+    let mut buf = Vec::new();
+    let log = Log::new();
+    rmp_serde::encode::write(&mut buf, &log).unwrap();
     b.bytes = buf.len() as u64;
 
     b.iter(|| {
-        let mut decoder = ::rmp_serde::Deserializer::new(&*buf);
-        let _log: Log = Deserialize::deserialize(&mut decoder).unwrap();
+        let _val: rmpv::ValueRef =
+            rmpv::decode::read_value_ref(&mut std::io::Cursor::new(buf.as_slice())).unwrap();
     });
 }
 
@@ -268,6 +317,6 @@ fn rust_bincode_deserialize(b: &mut Bencher) {
     b.bytes = buf.len() as u64;
 
     b.iter(|| {
-        let _log: Log = ::bincode::deserialize_from(&*buf).unwrap();
+        let _log: Log = ::bincode::deserialize(&buf).unwrap();
     });
 }
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
index eed06e9..bfa2e0c 100644
--- a/rust/src/lib.rs
+++ b/rust/src/lib.rs
@@ -10,6 +10,9 @@ extern crate serde;
 extern crate serde_derive;
 extern crate serde_json;
 
+use std::borrow::Cow;
+use std::fmt;
+
 pub mod log_capnp {
     include!(concat!(env!("OUT_DIR"), "/log_capnp.rs"));
 }
@@ -21,8 +24,6 @@ pub mod log_proto;
 #[path = "../target/flatbuffers/log_generated.rs"]
 pub mod log_flatbuffers;
 
-use std::fmt;
-
 macro_rules! enum_number {
     ($name:ident { $($variant:ident = $value:expr, )* }) => {
         #[derive(Clone, Copy, Debug, FromPrimitive)]
@@ -73,16 +74,20 @@ macro_rules! enum_number {
 }
 
 #[derive(Clone, Serialize, Deserialize, Debug)]
-pub struct Http {
+pub struct Http<'a> {
     pub protocol: HttpProtocol,
     pub status: u32,
     pub host_status: u32,
     pub up_status: u32,
     pub method: HttpMethod,
-    pub content_type: String,
-    pub user_agent: String,
-    pub referer: String,
-    pub request_uri: String,
+    #[serde(borrow)]
+    pub content_type: Cow<'a, str>,
+    #[serde(borrow)]
+    pub user_agent: Cow<'a, str>,
+    #[serde(borrow)]
+    pub referer: Cow<'a, str>,
+    #[serde(borrow)]
+    pub request_uri: Cow<'a, str>,
 }
 
 enum_number!(HttpProtocol {
@@ -113,10 +118,12 @@ enum_number!(CacheStatus {
 });
 
 #[derive(Clone, Serialize, Deserialize, Debug)]
-pub struct Origin {
-    pub ip: String,
+pub struct Origin<'a> {
+    #[serde(borrow)]
+    pub ip: Cow<'a, str>,
     pub port: u32,
-    pub hostname: String,
+    #[serde(borrow)]
+    pub hostname: Cow<'a, str>,
     pub protocol: OriginProtocol,
 }
 
@@ -394,23 +401,29 @@ enum_number!(Country {
 });
 
 #[derive(Clone, Serialize, Deserialize, Debug)]
-pub struct Log {
+pub struct Log<'a> {
     pub timestamp: i64,
     pub zone_id: u32,
     pub zone_plan: ZonePlan,
-    pub http: Http,
-    pub origin: Origin,
+    #[serde(borrow)]
+    pub http: Http<'a>,
+    #[serde(borrow)]
+    pub origin: Origin<'a>,
     pub country: Country,
     pub cache_status: CacheStatus,
-    pub server_ip: String,
-    pub server_name: String,
-    pub remote_ip: String,
+    #[serde(borrow)]
+    pub server_ip: Cow<'a, str>,
+    #[serde(borrow)]
+    pub server_name: Cow<'a, str>,
+    #[serde(borrow)]
+    pub remote_ip: Cow<'a, str>,
     pub bytes_dlv: u64,
-    pub ray_id: String,
+    #[serde(borrow)]
+    pub ray_id: Cow<'a, str>,
 }
 
-impl Log {
-    pub fn new() -> Log {
+impl<'a> Log<'a> {
+    pub fn new() -> Log<'a> {
         Log {
             timestamp: 2837513946597,
             zone_id: 123456,
@@ -421,31 +434,31 @@ impl Log {
                 host_status: 503,
                 up_status: 520,
                 method: HttpMethod::GET,
-                content_type: "text/html".to_string(),
-                user_agent: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36".to_string(),
-                referer: "https://www.cloudflare.com/".to_string(),
-                request_uri: "/cdn-cgi/trace".to_string(),
+                content_type: "text/html".into(),
+                user_agent: "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36".into(),
+                referer: "https://www.cloudflare.com/".into(),
+                request_uri: "/cdn-cgi/trace".into(),
             },
             origin: Origin {
-                ip: "1.2.3.4".to_string(),
+                ip: "1.2.3.4".into(),
                 port: 8000,
-                hostname: "www.example.com".to_string(),
+                hostname: "www.example.com".into(),
                 protocol: OriginProtocol::HTTPS,
             },
             country: Country::US,
             cache_status: CacheStatus::Hit,
-            server_ip: "192.168.1.1".to_string(),
-            server_name: "metal.cloudflare.com".to_string(),
-            remote_ip: "10.1.2.3".to_string(),
+            server_ip: "192.168.1.1".into(),
+            server_name: "metal.cloudflare.com".into(),
+            remote_ip: "10.1.2.3".into(),
             bytes_dlv: 123456,
-            ray_id: "10c73629cce30078-LAX".to_string(),
+            ray_id: "10c73629cce30078-LAX".into(),
         }
     }
 }
 
 pub mod protocol_capnp {
-    use capnp::message::{Allocator, Builder};
     use crate::log_capnp::{h_t_t_p, log, origin, CacheStatus, Country, ZonePlan};
+    use capnp::message::{Allocator, Builder};
 
     pub fn populate_log<'a, A: Allocator>(msg: &'a mut Builder<A>) -> log::Builder<'a> {
         let mut log = msg.init_root::<log::Builder>();
@@ -527,7 +540,9 @@ pub mod protocol_protobuf {
 pub mod protocol_flatbuffers {
     use crate::log_flatbuffers;
 
-    pub fn populate_log_with_args<'a, 'b>(msg: &'b mut flatbuffers::FlatBufferBuilder<'a>) -> flatbuffers::WIPOffset<log_flatbuffers::Log<'a>> {
+    pub fn populate_log_with_args<'a, 'b>(
+        msg: &'b mut flatbuffers::FlatBufferBuilder<'a>,
+    ) -> flatbuffers::WIPOffset<log_flatbuffers::Log<'a>> {
         let content_type = msg.create_string("text/html");
         let user_agent = msg.create_string("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
         let referer = msg.create_string("https://www.cloudflare.com/");
@@ -545,7 +560,7 @@ pub mod protocol_flatbuffers {
                 referer: Some(referer),
                 requestURI: Some(request_uri),
                 ..Default::default()
-            }
+            },
         );
 
         let ip = Some(msg.create_string("1.2.3.4"));
@@ -559,7 +574,7 @@ pub mod protocol_flatbuffers {
                 hostname,
                 protocol: log_flatbuffers::Origin_Protocol::https,
                 ..Default::default()
-            }
+            },
         );
 
         let server_ip = msg.create_string("192.168.1.1");
@@ -583,11 +598,13 @@ pub mod protocol_flatbuffers {
                 bytesDlv: 123456,
                 rayId: Some(ray_id),
                 ..Default::default()
-            }
+            },
         )
     }
 
-    pub fn populate_log_with_builder<'a, 'b>(msg: &'b mut flatbuffers::FlatBufferBuilder<'a>) -> flatbuffers::WIPOffset<log_flatbuffers::Log<'a>> {
+    pub fn populate_log_with_builder<'a, 'b>(
+        msg: &'b mut flatbuffers::FlatBufferBuilder<'a>,
+    ) -> flatbuffers::WIPOffset<log_flatbuffers::Log<'a>> {
         let content_type = msg.create_string("text/html");
         let user_agent = msg.create_string("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
         let referer = msg.create_string("https://www.cloudflare.com/");