fix: use hash of in-memory bytes only for code cache (denoland#23966)

* denoland/deno_core#752
* denoland/deno_core#753

Did benchmarking on this and it's slightly faster (couple ms) or equal
to in performance as main.

Closes denoland#23904

Cargo.toml

@@ -44,7 +44,7 @@ repository = "https://github.com/denoland/deno"
 
 [workspace.dependencies]
 deno_ast = { version = "=0.38.2", features = ["transpiling"] }
-deno_core = { version = "0.282.0" }
+deno_core = { version = "0.283.0" }
 
 deno_bench_util = { version = "0.147.0", path = "./bench_util" }
 deno_lockfile = "0.19.0"
@@ -174,6 +174,7 @@ tokio = { version = "1.36.0", features = ["full"] }
 tokio-metrics = { version = "0.3.0", features = ["rt"] }
 tokio-util = "0.7.4"
 tower-lsp = { version = "=0.20.0", features = ["proposed"] }
+twox-hash = "=1.6.3"
 # Upgrading past 2.4.1 may cause WPT failures
 url = { version = "< 2.5.0", features = ["serde", "expose_internals"] }
 uuid = { version = "1.3.0", features = ["v4"] }

cli/Cargo.toml

@@ -146,7 +146,7 @@ thiserror.workspace = true
 tokio.workspace = true
 tokio-util.workspace = true
 tower-lsp.workspace = true
-twox-hash = "=1.6.3"
+twox-hash.workspace = true
 typed-arena = "=2.0.1"
 uuid = { workspace = true, features = ["serde"] }
 walkdir = "=2.3.2"

cli/cache/code_cache.rs

@@ -1,5 +1,6 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
+use deno_ast::ModuleSpecifier;
 use deno_core::error::AnyError;
 use deno_runtime::code_cache;
 use deno_runtime::deno_webstorage::rusqlite::params;
@@ -21,7 +22,6 @@ pub static CODE_CACHE_DB: CacheDBConfiguration = CacheDBConfiguration {
   on_failure: CacheFailure::Blackhole,
 };
 
-#[derive(Clone)]
 pub struct CodeCache {
   inner: CodeCacheInner,
 }
@@ -52,28 +52,28 @@ impl CodeCache {
 
   pub fn get_sync(
     &self,
-    specifier: &str,
+    specifier: &ModuleSpecifier,
     code_cache_type: code_cache::CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
   ) -> Option<Vec<u8>> {
     Self::ensure_ok(self.inner.get_sync(
-      specifier,
+      specifier.as_str(),
       code_cache_type,
-      source_hash,
+      &source_hash.to_string(),
     ))
   }
 
   pub fn set_sync(
     &self,
-    specifier: &str,
+    specifier: &ModuleSpecifier,
     code_cache_type: code_cache::CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
     data: &[u8],
   ) {
     Self::ensure_ok(self.inner.set_sync(
-      specifier,
+      specifier.as_str(),
       code_cache_type,
-      source_hash,
+      &source_hash.to_string(),
       data,
     ));
   }
@@ -82,25 +82,24 @@ impl CodeCache {
 impl code_cache::CodeCache for CodeCache {
   fn get_sync(
     &self,
-    specifier: &str,
+    specifier: &ModuleSpecifier,
     code_cache_type: code_cache::CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
   ) -> Option<Vec<u8>> {
     self.get_sync(specifier, code_cache_type, source_hash)
   }
 
   fn set_sync(
     &self,
-    specifier: &str,
+    specifier: ModuleSpecifier,
     code_cache_type: code_cache::CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
     data: &[u8],
   ) {
-    self.set_sync(specifier, code_cache_type, source_hash, data);
+    self.set_sync(&specifier, code_cache_type, source_hash, data);
   }
 }
 
-#[derive(Clone)]
 struct CodeCacheInner {
   conn: CacheDB,
 }
@@ -135,7 +134,7 @@ impl CodeCacheInner {
     &self,
     specifier: &str,
     code_cache_type: code_cache::CodeCacheType,
-    source_hash: &str,
+    source_hash: &str, // use string because sqlite doesn't have a u64 type
     data: &[u8],
   ) -> Result<(), AnyError> {
     let sql = "

cli/cache/module_info.rs

@@ -87,23 +87,6 @@ impl ModuleInfoCache {
     }
   }
 
-  pub fn get_module_source_hash(
-    &self,
-    specifier: &ModuleSpecifier,
-    media_type: MediaType,
-  ) -> Result<Option<ModuleInfoCacheSourceHash>, AnyError> {
-    let query = "SELECT source_hash FROM moduleinfocache WHERE specifier=?1 AND media_type=?2";
-    let res = self.conn.query_row(
-      query,
-      params![specifier.as_str(), serialize_media_type(media_type)],
-      |row| {
-        let source_hash: String = row.get(0)?;
-        Ok(ModuleInfoCacheSourceHash(source_hash))
-      },
-    )?;
-    Ok(res)
-  }
-
   pub fn get_module_info(
     &self,
     specifier: &ModuleSpecifier,

cli/factory.rs

@@ -798,7 +798,6 @@ impl CliFactory {
         },
         self.emitter()?.clone(),
         self.main_module_graph_container().await?.clone(),
-        self.module_info_cache()?.clone(),
         self.module_load_preparer().await?.clone(),
         cli_node_resolver.clone(),
         NpmModuleLoader::new(

cli/module_loader.rs

@@ -13,7 +13,7 @@ use crate::args::CliOptions;
 use crate::args::DenoSubcommand;
 use crate::args::TsTypeLib;
 use crate::cache::CodeCache;
-use crate::cache::ModuleInfoCache;
+use crate::cache::FastInsecureHasher;
 use crate::cache::ParsedSourceCache;
 use crate::emit::Emitter;
 use crate::factory::CliFactory;
@@ -55,6 +55,7 @@ use deno_core::ModuleSpecifier;
 use deno_core::ModuleType;
 use deno_core::RequestedModuleType;
 use deno_core::ResolutionKind;
+use deno_core::SourceCodeCacheInfo;
 use deno_core::SourceMapGetter;
 use deno_graph::source::ResolutionMode;
 use deno_graph::source::Resolver;
@@ -67,7 +68,6 @@ use deno_graph::Resolution;
 use deno_lockfile::Lockfile;
 use deno_runtime::code_cache;
 use deno_runtime::deno_node::NodeResolutionMode;
-use deno_runtime::fs_util::code_timestamp;
 use deno_runtime::permissions::PermissionsContainer;
 use deno_semver::npm::NpmPackageReqReference;
 
@@ -221,7 +221,6 @@ struct SharedCliModuleLoaderState {
   code_cache: Option<Arc<CodeCache>>,
   emitter: Arc<Emitter>,
   main_module_graph_container: Arc<MainModuleGraphContainer>,
-  module_info_cache: Arc<ModuleInfoCache>,
   module_load_preparer: Arc<ModuleLoadPreparer>,
   node_resolver: Arc<CliNodeResolver>,
   npm_module_loader: NpmModuleLoader,
@@ -240,7 +239,6 @@ impl CliModuleLoaderFactory {
     code_cache: Option<Arc<CodeCache>>,
     emitter: Arc<Emitter>,
     main_module_graph_container: Arc<MainModuleGraphContainer>,
-    module_info_cache: Arc<ModuleInfoCache>,
     module_load_preparer: Arc<ModuleLoadPreparer>,
     node_resolver: Arc<CliNodeResolver>,
     npm_module_loader: NpmModuleLoader,
@@ -261,7 +259,6 @@ impl CliModuleLoaderFactory {
         code_cache,
         emitter,
         main_module_graph_container,
-        module_info_cache,
         module_load_preparer,
         node_resolver,
         npm_module_loader,
@@ -388,27 +385,20 @@ impl<TGraphContainer: ModuleGraphContainer>
     }
 
     let code_cache = if module_type == ModuleType::JavaScript {
-      self.shared.code_cache.as_ref().and_then(|cache| {
-        let code_hash = self
-          .get_code_hash_or_timestamp(specifier, code_source.media_type)
-          .ok()
-          .flatten();
-        if let Some(code_hash) = code_hash {
-          cache
-            .get_sync(
-              specifier.as_str(),
-              code_cache::CodeCacheType::EsModule,
-              &code_hash,
-            )
-            .map(Cow::from)
-            .inspect(|_| {
-              // This log line is also used by tests.
-              log::debug!(
-                "V8 code cache hit for ES module: {specifier}, [{code_hash:?}]"
-              );
-            })
-        } else {
-          None
+      self.shared.code_cache.as_ref().map(|cache| {
+        let code_hash = FastInsecureHasher::hash(&code);
+        let data = cache
+          .get_sync(specifier, code_cache::CodeCacheType::EsModule, code_hash)
+          .map(Cow::from)
+          .inspect(|_| {
+            // This log line is also used by tests.
+            log::debug!(
+              "V8 code cache hit for ES module: {specifier}, [{code_hash:?}]"
+            );
+          });
+        SourceCodeCacheInfo {
+          hash: code_hash,
+          data,
         }
       })
     } else {
@@ -589,25 +579,6 @@ impl<TGraphContainer: ModuleGraphContainer>
     resolution.map_err(|err| err.into())
   }
 
-  fn get_code_hash_or_timestamp(
-    &self,
-    specifier: &ModuleSpecifier,
-    media_type: MediaType,
-  ) -> Result<Option<String>, AnyError> {
-    let hash = self
-      .shared
-      .module_info_cache
-      .get_module_source_hash(specifier, media_type)?;
-    if let Some(hash) = hash {
-      return Ok(Some(hash.into()));
-    }
-
-    // Use the modified timestamp from the local file system if we don't have a hash.
-    let timestamp = code_timestamp(specifier.as_str())
-      .map(|timestamp| timestamp.to_string())?;
-    Ok(Some(timestamp))
-  }
-
   async fn load_prepared_module(
     &self,
     specifier: &ModuleSpecifier,
@@ -865,28 +836,21 @@ impl<TGraphContainer: ModuleGraphContainer> ModuleLoader
 
   fn code_cache_ready(
     &self,
-    specifier: &ModuleSpecifier,
+    specifier: ModuleSpecifier,
+    source_hash: u64,
     code_cache: &[u8],
   ) -> Pin<Box<dyn Future<Output = ()>>> {
     if let Some(cache) = self.0.shared.code_cache.as_ref() {
-      let media_type = MediaType::from_specifier(specifier);
-      let code_hash = self
-        .0
-        .get_code_hash_or_timestamp(specifier, media_type)
-        .ok()
-        .flatten();
-      if let Some(code_hash) = code_hash {
-        // This log line is also used by tests.
-        log::debug!(
-          "Updating V8 code cache for ES module: {specifier}, [{code_hash:?}]"
-        );
-        cache.set_sync(
-          specifier.as_str(),
-          code_cache::CodeCacheType::EsModule,
-          &code_hash,
-          code_cache,
-        );
-      }
+      // This log line is also used by tests.
+      log::debug!(
+        "Updating V8 code cache for ES module: {specifier}, [{source_hash:?}]"
+      );
+      cache.set_sync(
+        &specifier,
+        code_cache::CodeCacheType::EsModule,
+        source_hash,
+        code_cache,
+      );
     }
     std::future::ready(()).boxed_local()
   }

runtime/Cargo.toml

@@ -116,6 +116,7 @@ signal-hook = "0.3.17"
 signal-hook-registry = "1.4.0"
 tokio.workspace = true
 tokio-metrics.workspace = true
+twox-hash.workspace = true
 uuid.workspace = true
 which = "4.2.5"
 

runtime/code_cache.rs

@@ -1,5 +1,7 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
+use deno_core::ModuleSpecifier;
+
 pub enum CodeCacheType {
   EsModule,
   Script,
@@ -17,15 +19,15 @@ impl CodeCacheType {
 pub trait CodeCache: Send + Sync {
   fn get_sync(
     &self,
-    specifier: &str,
+    specifier: &ModuleSpecifier,
     code_cache_type: CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
   ) -> Option<Vec<u8>>;
   fn set_sync(
     &self,
-    specifier: &str,
+    specifier: ModuleSpecifier,
     code_cache_type: CodeCacheType,
-    source_hash: &str,
+    source_hash: u64,
     data: &[u8],
   );
 }