refactor: update core extension api usage (#19952)

2 files changed, 21 insertions, 27 deletions

diff --git a/bench_util/README.md b/bench_util/README.md
index 0ec15f0d0..3d507ecae 100644
--- a/bench_util/README.md
+++ b/bench_util/README.md
@@ -7,26 +7,18 @@ use deno_bench_util::bench_or_profile;
 use deno_bench_util::bencher::{benchmark_group, Bencher};
 use deno_bench_util::bench_js_sync};
 
-use deno_core::op_sync;
-use deno_core::serialize_op_result;
 use deno_core::Extension;
-use deno_core::JsRuntime;
-use deno_core::Op;
-use deno_core::OpState;
+
+#[op]
+fn op_nop() -> usize {
+  9
+}
 
 fn setup() -> Vec<Extension> {
-  let custom_ext = Extension::builder()
-    .ops(vec![
-      ("op_nop", |state, _| {
-        Op::Sync(serialize_op_result(Ok(9), state))
-      }),
-    ])
-    .build();
-  
-  vec![
-    // deno_{ext}::init(...),
-    custom_ext,
-  ]
+  vec![Extension {
+    name: "my_ext"
+    ops: std::borrow::Cow::Borrowed(&[op_nop::DECL])
+  }]
 }
 
 fn bench_op_nop(b: &mut Bencher) {
diff --git a/bench_util/benches/utf8.rs b/bench_util/benches/utf8.rs
index 9bc7cdaee..242fb2bfc 100644
--- a/bench_util/benches/utf8.rs
+++ b/bench_util/benches/utf8.rs
@@ -10,21 +10,23 @@ use deno_core::ExtensionFileSource;
 use deno_core::ExtensionFileSourceCode;
 
 fn setup() -> Vec<Extension> {
-  vec![Extension::builder("bench_setup")
-    .js(vec![ExtensionFileSource {
+  vec![Extension {
+    name: "bench_setup",
+    js_files: std::borrow::Cow::Borrowed(&[ExtensionFileSource {
       specifier: "ext:bench_setup/setup.js",
       code: ExtensionFileSourceCode::IncludedInBinary(
         r#"
-      const hello = "hello world\n";
-      const hello1k = hello.repeat(1e3);
-      const hello1m = hello.repeat(1e6);
-      const helloEncoded = Deno.core.encode(hello);
-      const hello1kEncoded = Deno.core.encode(hello1k);
-      const hello1mEncoded = Deno.core.encode(hello1m);
+        const hello = "hello world\n";
+        const hello1k = hello.repeat(1e3);
+        const hello1m = hello.repeat(1e6);
+        const helloEncoded = Deno.core.encode(hello);
+        const hello1kEncoded = Deno.core.encode(hello1k);
+        const hello1mEncoded = Deno.core.encode(hello1m);
       "#,
       ),
-    }])
-    .build()]
+    }]),
+    ..Default::default()
+  }]
 }
 
 fn bench_utf8_encode_12_b(b: &mut Bencher) {