From ad1bf802636c45c2315401121d486df7e7e95bc3 Mon Sep 17 00:00:00 2001
From: Ryan Fowler <ryan.fowler19@gmail.com>
Date: Mon, 11 Aug 2025 18:37:15 -0700
Subject: [PATCH] Cap the zstd window size for better browser support

---
 src/encode.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/encode.rs b/src/encode.rs
index 1cc5267..e2ae720 100644
--- a/src/encode.rs
+++ b/src/encode.rs
@@ -2,12 +2,12 @@ use std::fs::File;
 use std::io::{Read, Result, Write};
 
 use brotli::{
-    enc::{BrotliEncoderParams, StandardAlloc},
     BrotliCompressCustomAlloc,
+    enc::{BrotliEncoderParams, StandardAlloc},
 };
 use flate2::{
-    write::{DeflateEncoder, GzEncoder},
     Compression,
+    write::{DeflateEncoder, GzEncoder},
 };
 use zstd::Encoder;
 
@@ -96,6 +96,9 @@ impl Context {
 
     pub(crate) fn write_zstd(&mut self, input: &mut File, output: &mut File) -> Result<()> {
         let mut enc = Encoder::new(output, self.zstd_quality)?;
+        // Cap the HTTP window at 8 MiB (2^23) for browser support.
+        enc.window_log(23)?;
+        enc.long_distance_matching(false)?;
         loop {
             let n = input.read(&mut self.read_buf)?;
             if n == 0 {