chore: use bufreader to improve snapshot file serialization

Author: mootz12

soroban-ledger-snapshot/src/lib.rs

@@ -1,7 +1,7 @@
 use serde_with::serde_as;
 use std::{
     fs::{create_dir_all, File},
-    io::{self, Read, Write},
+    io::{self, BufReader, Read, Write},
     path::Path,
     rc::Rc,
 };
@@ -214,7 +214,8 @@ impl LedgerSnapshot {
 
     /// Read in a [`LedgerSnapshot`] from a file.
     pub fn read_file(p: impl AsRef<Path>) -> Result<LedgerSnapshot, Error> {
-        Self::read(File::open(p)?)
+        let reader = BufReader::new(File::open(p)?);
+        Self::read(reader)
     }
 
     /// Write a [`LedgerSnapshot`] to a writer.

soroban-sdk/src/testutils.rs

@@ -72,7 +72,8 @@ impl Snapshot {
 
     // Read in a [`Snapshot`] from a file.
     pub fn read_file(p: impl AsRef<std::path::Path>) -> Result<Snapshot, std::io::Error> {
-        Self::read(std::fs::File::open(p)?)
+        let reader = std::io::BufReader::new(std::fs::File::open(p)?);
+        Self::read(reader)
     }
 
     // Write a [`Snapshot`] to a writer.
@@ -104,7 +105,8 @@ impl EventsSnapshot {
 
     // Read in a [`EventsSnapshot`] from a file.
     pub fn read_file(p: impl AsRef<std::path::Path>) -> Result<EventsSnapshot, std::io::Error> {
-        Self::read(std::fs::File::open(p)?)
+        let reader = std::io::BufReader::new(std::fs::File::open(p)?);
+        Self::read(reader)
     }
 
     // Write a [`EventsSnapshot`] to a writer.
@@ -154,7 +156,8 @@ impl AuthSnapshot {
 
     // Read in a [`AuthSnapshot`] from a file.
     pub fn read_file(p: impl AsRef<std::path::Path>) -> Result<AuthSnapshot, std::io::Error> {
-        Self::read(std::fs::File::open(p)?)
+        let reader = std::io::BufReader::new(std::fs::File::open(p)?);
+        Self::read(reader)
     }
 
     // Write a [`AuthSnapshot`] to a writer.
@@ -200,7 +203,8 @@ impl Generators {
 
     // Read in a [`Generators`] from a file.
     pub fn read_file(p: impl AsRef<std::path::Path>) -> Result<Generators, std::io::Error> {
-        Self::read(std::fs::File::open(p)?)
+        let reader = std::io::BufReader::new(std::fs::File::open(p)?);
+        Self::read(reader)
     }
 
     // Write a [`Generators`] to a writer.