Update warning

packages/next/src/shared/lib/bloom-filter.ts

@@ -19,18 +19,28 @@ export class BloomFilter {
   bitArray: number[]
 
   constructor(numItems: number, errorRate: number) {
-    if (typeof window === 'undefined' && errorRate < 0.01) {
-      console.warn(
-        `Creating filter with error rate less than 1% (0.01) can increase the size dramatically proceed with caution. Received error rate ${errorRate}`
-      )
-    }
     this.numItems = numItems
     this.errorRate = errorRate
     this.numBits = Math.ceil(
       -(numItems * Math.log(errorRate)) / (Math.log(2) * Math.log(2))
     )
     this.numHashes = Math.ceil((this.numBits / numItems) * Math.log(2))
     this.bitArray = new Array(this.numBits).fill(0)
+
+    if (typeof window === 'undefined') {
+      if (errorRate < 0.01) {
+        const filterData = JSON.stringify(this.export())
+        const gzipSize = require('next/dist/compiled/gzip-size').sync(
+          filterData
+        )
+
+        if (gzipSize > 1024) {
+          console.warn(
+            `Creating filter with error rate less than 1% (0.01) can increase the size dramatically proceed with caution. Received error rate ${errorRate} resulted in size ${gzipSize} bytes (gzip)`
+          )
+        }
+      }
+    }
   }
 
   static from(items: string[], errorRate = 0.01) {