diff --git a/packages/compiler/src/backend/llvm/js-ic.ts b/packages/compiler/src/backend/llvm/js-ic.ts
index dc1aeab16..dbd11c155 100644
--- a/packages/compiler/src/backend/llvm/js-ic.ts
+++ b/packages/compiler/src/backend/llvm/js-ic.ts
@@ -84,10 +84,13 @@ function kindIs(host: Host, d: string, kind: number, yes: string, no: string): v
  * inline made polymorphic reads 7-10% faster (the design prototype's W2/W3)
  * and monomorphic method code no faster, for 65-225 more bytes per site;
  * the prototype hit made method-heavy code 3-6% faster for 15-90 bytes.
- * So a site tests entry 0, own or prototype, and its probe does the rest.
- * (0 makes every access probe: with a runtime built with SCR_JS_VERIFY,
- * that probes every access.) */
-const INLINE_WAYS: number = 1;
+ * Two entries cover the common two-layout site (object literals of one
+ * record built in two key orders): on bench:runtime's dynamic-properties
+ * they made the run 13% faster than one entry, and 26% faster without its
+ * class instances; four were no faster than two. So a site tests entries
+ * 0 and 1, own or prototype, and its probe does the rest. (0 makes every access probe: with a runtime
+ * built with SCR_JS_VERIFY, that probes every access.) */
+const INLINE_WAYS: number = 2;
 const INLINE_PROTO = true;
 
 /** The address of slot `slot` of layout-mode object `d`. */
diff --git a/packages/compiler/test/js-ic-emission.test.ts b/packages/compiler/test/js-ic-emission.test.ts
index b350c743d..e0ad8e329 100644
--- a/packages/compiler/test/js-ic-emission.test.ts
+++ b/packages/compiler/test/js-ic-emission.test.ts
@@ -50,6 +50,10 @@ console.log(read(o), at(dyn([5, 6]), 1), call(o), o.n);
     );
     expect(body(llvm, "read")).toContain("@scr_js_get_probe(");
     expect(body(llvm, "write")).toContain("@scr_js_store_probe(");
+    // Reads and writes test the first two entries inline: the second
+    // starts 40 bytes into the record.
+    for (const site of ["read", "write"])
+      expect(body(llvm, site)).toMatch(/getelementptr inbounds i8, ptr @sc_js_ic_\d+, i64 40$/m);
     expect(body(llvm, "at")).toContain("@scr_js_keyed_probe(");
     expect(body(llvm, "call")).toContain("@scr_js_load_probe(");
     // A compound assignment stores its number result from the jsval: an