X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=src%2Fcompress_parallel.c;h=6cd306c2fcb96d5aa6d8b7e64c08c27022c3ff12;hp=fa7f5dde113750adea8a1b43f12227748cd5109d;hb=44b239c501762cbee4ac0d218b144c937e642098;hpb=abe65b1f2f12bcedec1103cc7924897720f919be

diff --git a/src/compress_parallel.c b/src/compress_parallel.c
index fa7f5dde..6cd306c2 100644
--- a/src/compress_parallel.c
+++ b/src/compress_parallel.c
@@ -423,8 +423,15 @@ new_parallel_chunk_compressor(int out_ctype, u32 out_chunk_size,
 
 	desired_num_threads = num_threads;
 
-	chunks_per_msg = MAX_CHUNKS_PER_MSG;
-	msgs_per_thread = 2;
+	if (out_chunk_size < ((u32)1 << 23)) {
+		chunks_per_msg = MAX_CHUNKS_PER_MSG;
+		msgs_per_thread = 2;
+	} else {
+		/* Big chunks: Just have one buffer per thread --- more would
+		 * just waste memory.  */
+		chunks_per_msg = 1;
+		msgs_per_thread = 1;
+	}
 	for (;;) {
 		approx_mem_required =
 			(u64)chunks_per_msg *