From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 28 Jul 2025 21:46:01 +0000 (+0200)
Subject: parallel-max: bump the max value to 65535
X-Git-Tag: curl-8_16_0~339
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a7e6c78bfa3e4edcb3c0dcd105d2edc73d9e8b09;p=thirdparty%2Fcurl.git

parallel-max: bump the max value to 65535

When doing HTTP/2 and HTTP/3, it is possible to achieve quite a massive
parallelism so limiting this to 300 seems restrictive.

With other protocols, going beyond 300-400 might not be recommended but
curl does not have to enforce the limit.

Closes #18068
---

diff --git a/docs/cmdline-opts/parallel-max.md b/docs/cmdline-opts/parallel-max.md
index 6b3684b8f2..fc5470eb02 100644
--- a/docs/cmdline-opts/parallel-max.md
+++ b/docs/cmdline-opts/parallel-max.md
@@ -19,4 +19,4 @@ Example:
 When asked to do parallel transfers, using --parallel, this option controls
 the maximum amount of transfers to do simultaneously.
 
-The default is 50. 300 is the largest supported value.
+The default is 50. 65535 is the largest supported value.
diff --git a/src/tool_main.h b/src/tool_main.h
index 95d603f4a0..1e32ee7f8d 100644
--- a/src/tool_main.h
+++ b/src/tool_main.h
@@ -30,7 +30,7 @@
 #define RETRY_SLEEP_DEFAULT 1000L   /* ms */
 #define RETRY_SLEEP_MAX     600000L /* ms == 10 minutes */
 
-#define MAX_PARALLEL 300 /* conservative */
+#define MAX_PARALLEL 65535
 #define PARALLEL_DEFAULT 50
 
 #endif /* HEADER_CURL_TOOL_MAIN_H */