Remove SharedArrayBuffer workaround

src/actions/receive-profile.ts

@@ -1065,7 +1065,7 @@ async function _extractZipFromResponse(
 async function _extractJsonFromArrayBuffer(
   arrayBuffer: ArrayBuffer
 ): Promise<unknown> {
-  let profileBytes: Uint8Array<ArrayBufferLike> = new Uint8Array(arrayBuffer);
+  let profileBytes = new Uint8Array(arrayBuffer);
   // Check for the gzip magic number in the header.
   if (isGzip(profileBytes)) {
     profileBytes = await decompress(profileBytes);

src/profile-logic/process-profile.ts

@@ -1980,9 +1980,7 @@ export async function unserializeProfileOfArbitraryFormat(
     // object is constructed from an ArrayBuffer in a different context... which
     // happens in our tests.
     if (String(arbitraryFormat) === '[object ArrayBuffer]') {
-      // Obviously Flow doesn't understand that this is correct, so let's help
-      // Flow here.
-      let arrayBuffer: ArrayBufferLike = arbitraryFormat as any;
+      let arrayBuffer = arbitraryFormat as ArrayBuffer;
 
       // Check for the gzip magic number in the header. If we find it, decompress
       // the data first.

src/test/store/receive-profile.test.ts

@@ -131,7 +131,7 @@ describe('actions/receive-profile', function () {
     return states;
   }
 
-  function encode(string: string): Uint8Array {
+  function encode(string: string): Uint8Array<ArrayBuffer> {
     return new TextEncoder().encode(string);
   }
 

src/utils/gz.ts

@@ -32,20 +32,8 @@ async function readableStreamToBuffer(
   return result;
 }
 
-// The Streams API doesn't support SAB, and so we need to copy from these to
-// use these API's.
-function copyBufferIfShared(buffer: Uint8Array): Uint8Array<ArrayBuffer> {
-  // Check if the buffer is a view into a larger ArrayBuffer (shared)
-  if (buffer.buffer instanceof SharedArrayBuffer) {
-    // Create a new buffer with its own ArrayBuffer
-    return new Uint8Array(buffer);
-  }
-  // Return the original buffer if it's not shared
-  return buffer as Uint8Array<ArrayBuffer>;
-}
-
 export async function compress(
-  data: string | Uint8Array
+  data: string | Uint8Array<ArrayBuffer>
 ): Promise<Uint8Array<ArrayBuffer>> {
   // Encode the data if it's a string
   const arrayData =
@@ -56,22 +44,22 @@ export async function compress(
 
   // Write the data to the compression stream
   const writer = compressionStream.writable.getWriter();
-  writer.write(copyBufferIfShared(arrayData));
+  writer.write(arrayData);
   writer.close();
 
   // Read the compressed data back into a buffer
   return readableStreamToBuffer(compressionStream.readable);
 }
 
 export async function decompress(
-  data: Uint8Array
+  data: Uint8Array<ArrayBuffer>
 ): Promise<Uint8Array<ArrayBuffer>> {
   // Create a gzip compression stream
   const decompressionStream = new DecompressionStream('gzip');
 
   // Write the data to the compression stream
   const writer = decompressionStream.writable.getWriter();
-  writer.write(copyBufferIfShared(data));
+  writer.write(data);
   writer.close();
 
   // Read the compressed data back into a buffer