diff --git a/web/js/main.mjs b/web/js/main.mjs
index 44bdfbe..e10000a 100644
--- a/web/js/main.mjs
+++ b/web/js/main.mjs
@@ -1,9 +1,8 @@
-import processFast from "./proof-of-work.mjs";
-import processSlow from "./proof-of-work-slow.mjs";
+import process from "./proof-of-work.mjs";
 
 const algorithms = {
-  fast: processFast,
-  slow: processSlow,
+  fast: process,
+  slow: process,
 };
 
 // from Xeact
diff --git a/web/js/proof-of-work-slow.mjs b/web/js/proof-of-work-slow.mjs
deleted file mode 100644
index 33780f8..0000000
--- a/web/js/proof-of-work-slow.mjs
+++ /dev/null
@@ -1,99 +0,0 @@
-// https://dev.to/ratmd/simple-proof-of-work-in-javascript-3kgm
-
-export default function process(
-  data,
-  difficulty = 5,
-  signal = null,
-  progressCallback = null,
-  _threads = 1,
-) {
-  console.debug("slow algo");
-  return new Promise((resolve, reject) => {
-    let webWorkerURL = URL.createObjectURL(
-      new Blob(["(", processTask(), ")()"], { type: "application/javascript" }),
-    );
-
-    let worker = new Worker(webWorkerURL);
-    let settled = false;
-
-    const cleanup = () => {
-      if (settled) return;
-      settled = true;
-      worker.terminate();
-      if (signal != null) {
-        signal.removeEventListener("abort", onAbort);
-      }
-      URL.revokeObjectURL(webWorkerURL);
-    };
-
-    const onAbort = () => {
-      console.log("PoW aborted");
-      cleanup();
-      reject(new DOMException("Aborted", "AbortError"));
-    };
-
-    if (signal != null) {
-      if (signal.aborted) {
-        return onAbort();
-      }
-      signal.addEventListener("abort", onAbort, { once: true });
-    }
-
-    worker.onmessage = (event) => {
-      if (typeof event.data === "number") {
-        progressCallback?.(event.data);
-      } else {
-        cleanup();
-        resolve(event.data);
-      }
-    };
-
-    worker.onerror = (event) => {
-      cleanup();
-      reject(event);
-    };
-
-    worker.postMessage({
-      data,
-      difficulty,
-    });
-  });
-}
-
-function processTask() {
-  return function () {
-    const sha256 = (text) => {
-      const encoded = new TextEncoder().encode(text);
-      return crypto.subtle.digest("SHA-256", encoded.buffer).then((result) =>
-        Array.from(new Uint8Array(result))
-          .map((c) => c.toString(16).padStart(2, "0"))
-          .join(""),
-      );
-    };
-
-    addEventListener("message", async (event) => {
-      let data = event.data.data;
-      let difficulty = event.data.difficulty;
-
-      let hash;
-      let nonce = 0;
-      do {
-        if ((nonce & 1023) === 0) {
-          postMessage(nonce);
-        }
-        hash = await sha256(data + nonce++);
-      } while (
-        hash.substring(0, difficulty) !== Array(difficulty + 1).join("0")
-      );
-
-      nonce -= 1; // last nonce was post-incremented
-
-      postMessage({
-        hash,
-        data,
-        difficulty,
-        nonce,
-      });
-    });
-  }.toString();
-}