From b3d7df55357ea6fc6f5141b64a9638ddb39b0f63 Mon Sep 17 00:00:00 2001
From: Igor Zinkovsky <igor@deno.com>
Date: Wed, 17 Apr 2024 07:19:55 -0700
Subject: perf: v8 code cache (#23081)
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This PR enables V8 code cache for ES modules and for `require` scripts
through `op_eval_context`. Code cache artifacts are transparently stored
and fetched using sqlite db and are passed to V8. `--no-code-cache` can
be used to disable.

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
---
 cli/cache/module_info.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'cli/cache/module_info.rs')

diff --git a/cli/cache/module_info.rs b/cli/cache/module_info.rs
index 6d317b216..2e9274160 100644
--- a/cli/cache/module_info.rs
+++ b/cli/cache/module_info.rs
@@ -39,6 +39,7 @@ pub static MODULE_INFO_CACHE_DB: CacheDBConfiguration = CacheDBConfiguration {
   on_failure: CacheFailure::InMemory,
 };
 
+#[derive(Debug)]
 pub struct ModuleInfoCacheSourceHash(String);
 
 impl ModuleInfoCacheSourceHash {
@@ -55,6 +56,12 @@ impl ModuleInfoCacheSourceHash {
   }
 }
 
+impl From<ModuleInfoCacheSourceHash> for String {
+  fn from(source_hash: ModuleInfoCacheSourceHash) -> String {
+    source_hash.0
+  }
+}
+
 /// A cache of `deno_graph::ModuleInfo` objects. Using this leads to a considerable
 /// performance improvement because when it exists we can skip parsing a module for
 /// deno_graph.
@@ -80,6 +87,23 @@ 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,
-- 
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