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-rw-r--r--guix/store.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/guix/store.scm b/guix/store.scm
index 689a94c636..a669011f3a 100644
--- a/guix/store.scm
+++ b/guix/store.scm
@@ -470,7 +470,8 @@ encoding conversion errors."
;; Write a byte stream to USER-PORT.
(let* ((len (read-int p))
(m (modulo len 8)))
- (dump-port p user-port len)
+ (dump-port p user-port len
+ #:buffer-size (if (<= len 16384) 16384 65536))
(unless (zero? m)
;; Consume padding, as for strings.
(get-bytevector-n p (- 8 m))))