Switched from serde_json to bincode for the data.

.vscode/settings.json

@@ -1,5 +1,6 @@
 {
   "cSpell.words": [
+    "bincode",
     "byteorder",
     "femto",
     "FEMTOS",

Cargo.lock

@@ -74,6 +74,25 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "bincode"
+version = "2.0.0-rc.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f11ea1a0346b94ef188834a65c068a03aec181c94896d481d7a0a40d85b0ce95"
+dependencies = [
+ "bincode_derive",
+ "serde",
+]
+
+[[package]]
+name = "bincode_derive"
+version = "2.0.0-rc.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e30759b3b99a1b802a7a3aa21c85c3ded5c28e1c83170d82d70f08bbf7f3e4c"
+dependencies = [
+ "virtue",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -205,6 +224,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "average",
+ "bincode",
  "byteorder",
  "clap",
  "extend",
@@ -221,6 +241,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "average",
+ "bincode",
  "clap",
  "ftmemsim",
  "ftmemsim-util",
@@ -601,6 +622,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "virtue"
+version = "0.0.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9dcc60c0624df774c82a0ef104151231d37da4962957d691c011c852b2473314"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"

Cargo.toml

@@ -16,6 +16,7 @@ tracing = "0.1.37"
 tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"
+bincode = "2.0.0-rc.3"
 gnuplot = "0.0.38"
 
 # Workspace members

examples/ram-capacity/run.sh

@@ -26,7 +26,7 @@ cargo build -p ftmemsim -p ftmemsim-graphs
 pids=""
 for ram_capacity in $RAM_CAPACITIES; do
 	config_file="config/$ram_capacity.json"
-	output_file="output/$ram_capacity.json"
+	output_file="output/$ram_capacity.bin"
 	log_file="logs/$ram_capacity.json"
 	graph_migrations_file="graphs/migrations-$ram_capacity.$GRAPH_OUTPUT_FORMAT"
 	graph_migrations_hist_file="graphs/migrations-hist-$ram_capacity.$GRAPH_OUTPUT_FORMAT"

ftmemsim-graphs/Cargo.toml

@@ -12,5 +12,6 @@ serde_json = { workspace = true }
 itertools = { workspace = true }
 gnuplot = { workspace = true }
 average = { workspace = true }
+bincode = { workspace = true }
 ftmemsim = { workspace = true }
 ftmemsim-util = { workspace = true }

ftmemsim-graphs/src/main.rs

@@ -31,7 +31,8 @@ fn main() -> Result<(), anyhow::Error> {
 	// Parse the input file
 	let data = {
 		let data_file = std::fs::File::open(args.input_file).context("Unable to open input file")?;
-		serde_json::from_reader::<_, ftmemsim::data::Data>(data_file).context("Unable to parse input file")?
+		bincode::decode_from_std_read::<ftmemsim::data::Data, _, _>(&mut &data_file, bincode::config::standard())
+			.context("Unable to parse input file")?
 	};
 	tracing::info!("Read data file");
 

ftmemsim/Cargo.toml

@@ -13,4 +13,5 @@ extend = { workspace = true }
 itertools = { workspace = true }
 serde = { workspace = true }
 tracing = { workspace = true }
+bincode = { workspace = true }
 ftmemsim-util = { workspace = true }

ftmemsim/src/bin/ftmemsim/main.rs

@@ -118,7 +118,8 @@ fn main() -> Result<(), anyhow::Error> {
 		};
 
 		let output_file = fs::File::create(output_path).context("Unable to create output file")?;
-		serde_json::to_writer(output_file, &data).context("Unable to write to output file")?;
+		bincode::encode_into_std_write(data, &mut &output_file, bincode::config::standard())
+			.context("Unable to write to output file")?;
 	}
 
 	Ok(())

ftmemsim/src/data.rs

@@ -6,6 +6,7 @@ use std::collections::BTreeMap;
 /// Output data
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct Data {
 	pub hemem: HeMemData,
 }
@@ -13,6 +14,7 @@ pub struct Data {
 /// Hemem output data
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct HeMemData {
 	pub page_accesses:   PageAccesses,
 	pub page_migrations: PageMigrations,
@@ -21,6 +23,7 @@ pub struct HeMemData {
 /// Page accesses
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct PageAccesses {
 	pub accesses: Vec<PageAccess>,
 }
@@ -28,6 +31,7 @@ pub struct PageAccesses {
 /// Page access
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct PageAccess {
 	pub page_ptr:       u64,
 	pub time:           u64,
@@ -42,6 +46,7 @@ pub struct PageAccess {
 /// Page access kind
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub enum PageAccessKind {
 	Read,
 	Write,
@@ -50,6 +55,7 @@ pub enum PageAccessKind {
 /// Page migrations
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct PageMigrations {
 	// Note: We use a `BTreeMap` to ensure the order of the migrations
 	//       is always the same, as well as to sort it by page.
@@ -61,6 +67,7 @@ pub struct PageMigrations {
 /// Page migration
 #[derive(Debug)]
 #[derive(serde::Serialize, serde::Deserialize)]
+#[derive(bincode::Encode, bincode::Decode)]
 pub struct PageMigration {
 	pub prev_mem_idx: Option<usize>,
 	pub cur_mem_idx:  usize,

run.sh

@@ -13,7 +13,7 @@ PROFILE="release"
 TRACE_FILE="resources/traces/bfs.g17.n100.t1.trace"
 #TRACE_FILE="resources/traces/bc.g18.n100.t1.trace"
 
-OUTPUT_FILE="resources/data/output.json"
+OUTPUT_FILE="resources/data/output.bin"
 
 CONFIG="config.json"