From 57f90fe2099dd936035844b8f2ed350018141c94 Mon Sep 17 00:00:00 2001
From: DaniPopes <57450786+DaniPopes@users.noreply.github.com>
Date: Fri, 11 Aug 2023 15:59:08 +0200
Subject: [PATCH] perf: buffer writes when serializing json

---
 ethers-solc/src/cache.rs       | 5 ++++-
 ethers-solc/src/compile/mod.rs | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/ethers-solc/src/cache.rs b/ethers-solc/src/cache.rs
index a239f0f0f2..f87ca8ea99 100644
--- a/ethers-solc/src/cache.rs
+++ b/ethers-solc/src/cache.rs
@@ -16,6 +16,7 @@ use std::{
         hash_map, BTreeSet, HashMap, HashSet,
     },
     fs::{self},
+    io::Write,
     path::{Path, PathBuf},
     time::{Duration, UNIX_EPOCH},
 };
@@ -139,7 +140,9 @@ impl SolFilesCache {
             self.len(),
             path.display()
         );
-        serde_json::to_writer_pretty(file, self)?;
+        let mut writer = std::io::BufWriter::with_capacity(1024 * 256, file);
+        serde_json::to_writer_pretty(&mut writer, self)?;
+        writer.flush().map_err(|e| SolcError::io(e, path))?;
         tracing::trace!("cache file located: \"{}\"", path.display());
         Ok(())
     }
diff --git a/ethers-solc/src/compile/mod.rs b/ethers-solc/src/compile/mod.rs
index 3eaa11cb2e..38f46e058d 100644
--- a/ethers-solc/src/compile/mod.rs
+++ b/ethers-solc/src/compile/mod.rs
@@ -8,7 +8,7 @@ use semver::{Version, VersionReq};
 use serde::{de::DeserializeOwned, Deserialize, Serialize};
 use std::{
     fmt,
-    io::BufRead,
+    io::{BufRead, Write},
     path::{Path, PathBuf},
     process::{Command, Output, Stdio},
     str::FromStr,