Use mmap to read filters

Author: ctz

Cargo.lock

@@ -21,6 +21,7 @@ hex = { version = "0.4", features = ["serde"] }
 http = "1"
 insta = { version = "1.44.3", features = ["filters"] }
 insta-cmd = "0.6.0"
+memmap2 = "0.9.9"
 reqwest = { version = "0.13", default-features = false, features = ["charset", "default-tls", "h2", "http2", "json"] }
 rand = "0.10"
 regex = "1.12"

Cargo.toml

@@ -16,6 +16,7 @@ clap.workspace = true
 clubcard-crlite.workspace = true
 eyre.workspace = true
 hex.workspace = true
+memmap2.workspace = true
 reqwest.workspace = true
 rustls-pki-types.workspace = true
 rustls-webpki.workspace = true

upki/Cargo.toml

@@ -74,7 +74,7 @@ impl Manifest {
         let cache_dir = config.revocation_cache_dir();
         for f in &self.filters {
             let path = cache_dir.join(&f.filename);
-            let bytes = match fs::read(&path) {
+            let bytes = match File::open(&path).and_then(|f| unsafe { memmap2::Mmap::map(&f) }) {
                 Ok(bytes) => bytes,
                 Err(error) => {
                     return Err(Error::FilterRead {