fix(ext/http): flush gzip streaming response (#23991)

This commit changes `gzip` compression in `Deno.serve` API to flush data
after each write. There's a slight performance regression, but provided
test shows a scenario that was not possible before.

---------

Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com>

1 files changed, 7 insertions, 8 deletions

diff --git a/tests/unit/test_util.ts b/tests/unit/test_util.ts
index ba9bf1839..db2585ebd 100644
--- a/tests/unit/test_util.ts
+++ b/tests/unit/test_util.ts
@@ -35,14 +35,9 @@ export function execCode(code: string): Promise<readonly [number, string]> {
   return execCode2(code).finished();
 }
 
-export function execCode2(code: string) {
-  const command = new Deno.Command(Deno.execPath(), {
-    args: [
-      "eval",
-      "--unstable",
-      "--no-check",
-      code,
-    ],
+export function execCode3(cmd: string, args: string[]) {
+  const command = new Deno.Command(cmd, {
+    args,
     stdout: "piped",
     stderr: "inherit",
   });
@@ -82,6 +77,10 @@ export function execCode2(code: string) {
   };
 }
 
+export function execCode2(code: string) {
+  return execCode3(Deno.execPath(), ["eval", "--unstable", "--no-check", code]);
+}
+
 export function tmpUnixSocketPath(): string {
   const folder = Deno.makeTempDirSync();
   return join(folder, "socket");