chore(cli,ext,rt): remove some unnecessary clone or malloc (#17261)

cli/build.rs

@@ -1,11 +1,11 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
-use deno_core::Extension;
 use std::env;
 use std::path::Path;
 use std::path::PathBuf;
 
 use deno_core::snapshot_util::*;
+use deno_core::Extension;
 use deno_runtime::deno_cache::SqliteBackedCache;
 use deno_runtime::permissions::Permissions;
 use deno_runtime::*;

cli/file_fetcher.rs

@@ -90,7 +90,7 @@ fn fetch_local(specifier: &ModuleSpecifier) -> Result<File, AnyError> {
   let local = specifier.to_file_path().map_err(|_| {
     uri_error(format!("Invalid file path.\n  Specifier: {}", specifier))
   })?;
-  let bytes = fs::read(local.clone())?;
+  let bytes = fs::read(&local)?;
   let charset = text_encoding::detect_charset(&bytes).to_string();
   let source = get_source_from_bytes(bytes, Some(charset))?;
   let media_type = MediaType::from(specifier);
@@ -359,7 +359,7 @@ impl FileFetcher {
     let blob = {
       let blob_store = self.blob_store.borrow();
       blob_store
-        .get_object_url(specifier.clone())?
+        .get_object_url(specifier.clone())
         .ok_or_else(|| {
           custom_error(
             "NotFound",
@@ -525,7 +525,7 @@ impl FileFetcher {
       CacheSetting::ReloadSome(list) => {
         let mut url = specifier.clone();
         url.set_fragment(None);
-        if list.contains(&url.as_str().to_string()) {
+        if list.iter().any(|x| x == url.as_str()) {
           return false;
         }
         url.set_query(None);

cli/tools/check.rs

@@ -79,10 +79,10 @@ pub fn check(
   let root_names = get_tsc_roots(&segment_graph_data, check_js);
   if options.log_checks {
     for (root, _) in roots {
-      let root_str = root.to_string();
+      let root_str = root.as_str();
       // `$deno` specifiers are internal, don't print them.
       if !root_str.contains("$deno") {
-        log::info!("{} {}", colors::green("Check"), root);
+        log::info!("{} {}", colors::green("Check"), root_str);
       }
     }
   }
@@ -116,12 +116,20 @@ pub fn check(
   let diagnostics = if options.type_check_mode == TypeCheckMode::Local {
     response.diagnostics.filter(|d| {
       if let Some(file_name) = &d.file_name {
-        !file_name.starts_with("http")
-          && ModuleSpecifier::parse(file_name)
+        if !file_name.starts_with("http") {
+          if ModuleSpecifier::parse(file_name)
             .map(|specifier| !npm_resolver.in_npm_package(&specifier))
             .unwrap_or(true)
+          {
+            Some(d.clone())
+          } else {
+            None
+          }
+        } else {
+          None
+        }
       } else {
-        true
+        Some(d.clone())
       }
     })
   } else {

cli/tsc/diagnostics.rs

@@ -340,9 +340,9 @@ impl Diagnostics {
   /// returns `true` are included.
   pub fn filter<P>(&self, predicate: P) -> Self
   where
-    P: FnMut(&Diagnostic) -> bool,
+    P: FnMut(&Diagnostic) -> Option<Diagnostic>,
   {
-    let diagnostics = self.0.clone().into_iter().filter(predicate).collect();
+    let diagnostics = self.0.iter().filter_map(predicate).collect();
     Self(diagnostics)
   }
 

ext/web/blob.rs

@@ -47,13 +47,10 @@ impl BlobStore {
     parts.remove(id)
   }
 
-  pub fn get_object_url(
-    &self,
-    mut url: Url,
-  ) -> Result<Option<Arc<Blob>>, AnyError> {
+  pub fn get_object_url(&self, mut url: Url) -> Option<Arc<Blob>> {
     let blob_store = self.object_urls.lock();
     url.set_fragment(None);
-    Ok(blob_store.get(&url).cloned())
+    blob_store.get(&url).cloned()
   }
 
   pub fn insert_object_url(
@@ -285,7 +282,7 @@ pub fn op_blob_from_object_url(
   let blob_store = state.try_borrow::<BlobStore>().ok_or_else(|| {
     type_error("Blob URLs are not supported in this context.")
   })?;
-  if let Some(blob) = blob_store.get_object_url(url)? {
+  if let Some(blob) = blob_store.get_object_url(url) {
     let parts = blob
       .parts
       .iter()

runtime/ops/web_worker/sync_fetch.rs

@@ -107,7 +107,7 @@ pub fn op_worker_sync_fetch(
             }
             "blob" => {
               let blob =
-                blob_store.get_object_url(script_url)?.ok_or_else(|| {
+                blob_store.get_object_url(script_url).ok_or_else(|| {
                   type_error("Blob for the given URL not found.")
                 })?;