diff --git a/benchmark/modular.js b/benchmark/modular.js
index 5f4234b..5ebe918 100644
--- a/benchmark/modular.js
+++ b/benchmark/modular.js
@@ -1,10 +1,13 @@
 import { run, mark } from 'micro-bmark';
 import { secp256k1 } from '../secp256k1.js';
+import { Fp } from '../abstract/modular.js';
 
 run(async () => {
   console.log(`\x1b[36mmodular, secp256k1 field\x1b[0m`);
-  const { Fp } = secp256k1.CURVE;
-  await mark('invert a', 30000, () => Fp.inv(2n ** 232n - 5910n));
-  await mark('invert b', 30000, () => Fp.inv(2n ** 231n - 5910n));
-  await mark('sqrt', 15000, () => Fp.sqrt(2n ** 231n - 5910n));
+  const { Fp: secpFp } = secp256k1.CURVE;
+  await mark('invert a', 300000, () => secpFp.inv(2n ** 232n - 5910n));
+  await mark('invert b', 300000, () => secpFp.inv(2n ** 231n - 5910n));
+  await mark('sqrt p = 3 mod 4', 15000, () => secpFp.sqrt(2n ** 231n - 5910n));
+  const FpStark = Fp(BigInt('0x800000000000011000000000000000000000000000000000000000000000001'));
+  await mark('sqrt tonneli-shanks', 500, () => FpStark.sqrt(2n ** 231n - 5909n))
 });