Clarify perf comment

The actual unoptimized bytecode contains one additional instruction but this is definitely a bit faster in benchmarks

Author: thecrypticace

packages/tailwindcss/src/source-maps/line-table.ts

@@ -62,7 +62,7 @@ export function createLineTable(source: string): LineTable {
     let line = 0
     let count = table.length
     while (count > 0) {
-      // `| 0` forces integer bytecode generation
+      // `| 0` improves performance (in V8 at least)
       let mid = (count | 0) >> 1
       let i = line + mid
       if (table[i] <= offset) {