From: Eric Biggers <ebiggers3@gmail.com>
Date: Mon, 13 Jan 2014 06:30:50 +0000 (-0600)
Subject: write_stream_list(): Do not create threads to compress 1 chunk or less
X-Git-Tag: v1.6.1~57
X-Git-Url: https://wimlib.net/git/?p=wimlib;a=commitdiff_plain;h=a460c9e7653b2fde6f40c0a5336a695ba52ffa87;ds=sidebyside

write_stream_list(): Do not create threads to compress 1 chunk or less
---

diff --git a/src/write.c b/src/write.c
index a852c199..63350bfc 100644
--- a/src/write.c
+++ b/src/write.c
@@ -1430,11 +1430,11 @@ write_stream_list(struct list_head *stream_list,
 	 * to do compression.  There are serial and parallel implementations of
 	 * the chunk_compressor interface.  We default to parallel using the
 	 * specified number of threads, unless the upper bound on the number
-	 * bytes needing to be compressed is less 2000000 (heuristic value).  */
+	 * bytes needing to be compressed is less than a heuristic value.  */
 	if (out_ctype != WIMLIB_COMPRESSION_TYPE_NONE) {
 
 	#ifdef ENABLE_MULTITHREADED_COMPRESSION
-		if (ctx.num_bytes_to_compress >= 2000000) {
+		if (ctx.num_bytes_to_compress > max(2000000, out_chunk_size)) {
 			ret = new_parallel_chunk_compressor(out_ctype,
 							    out_chunk_size,
 							    num_threads, 0,