diff --git a/src/targets/worker.ts b/src/targets/worker.ts
index f4fccd1f9c..2b392f3a30 100644
--- a/src/targets/worker.ts
+++ b/src/targets/worker.ts
@@ -1,16 +1,14 @@
 import { SLSTarget } from '../config'
 
+// https://gist.github.com/pi0/1476085924f8a2eb1df85929c20cb43f
+
 const polyfill = `
 const exports = {};
 const module = { exports };
 const process = { env: {} };
-const performance = {};
-
-// https://github.com/cabinjs/browser-hrtime
-'!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e="undefined"!=typeof globalThis?globalThis:e||self).hrtime=n()}(this,(function(){"use strict";var e=function(e){!function(){if("performance"in window==0&&(window.performance={}),Date.now=Date.now||function(){return(new Date).getTime()},"now"in window.performance==0){var e=Date.now();performance.timing&&performance.timing.navigationStart&&(e=performance.timing.navigationStart),window.performance.now=function(){return Date.now()-e}}}();var n=Math.floor(.001*(Date.now()-performance.now())),o=.001*performance.now(),r=Math.floor(o)+n,i=Math.floor(o%1*1e9);return e&&(r-=e[0],(i-=e[1])<0&&(r--,i+=1e9)),[r,i]};return e.bigint=function(n){var o=e(n);return 1e9*o[0]+o[1]},"undefined"!=typeof process&&void 0!==process.hrtime||void 0!==window.process||(window.process={}),void 0===process.hrtime?window.process.hrtime=e:process.hrtime}));'
-
 const global = { process };
 const window = global;
+const o=Date.now(),t=()=>Date.now()-o;process.hrtime=o=>{const e=Math.floor(.001*(Date.now()-t())),n=.001*t();let a=Math.floor(n)+e,r=Math.floor(n%1*1e9);return o&&(a-=o[0],r-=o[1],r<0&&(a--,r+=1e9)),[a,r]};
 `
 
 export const worker: SLSTarget = {