From: Yann Collet <cyan@fb.com>
Date: Mon, 12 Mar 2018 11:02:57 +0000 (-0700)
Subject: minor bench improvements
X-Git-Tag: v1.3.4~1^2~30^2~3
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f24566b597a6040e3be5f34bc582a61cac17d680;p=thirdparty%2Fzstd.git

minor bench improvements

- do not test level 0, as it is converted into level 3,
  which feels strange when compressing multiple levels
- Use direct synchronous mode when a single worker is requested.
---

diff --git a/programs/bench.c b/programs/bench.c
index e53f6bc10..014a4fd41 100644
--- a/programs/bench.c
+++ b/programs/bench.c
@@ -214,6 +214,7 @@ static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
 
     /* init */
     if (strlen(displayName)>17) displayName += strlen(displayName)-17;   /* display last 17 characters */
+    if (g_nbWorkers==1) g_nbWorkers=0;   /* prefer synchronous mode */
 
     if (g_decodeOnly) {  /* benchmark only decompression : source must be already compressed */
         const char* srcPtr = (const char*)srcBuffer;
@@ -534,7 +535,7 @@ static void BMK_benchCLevel(const void* srcBuffer, size_t benchedSize,
         DISPLAY("bench %s %s: input %u bytes, %u seconds, %u KB blocks\n", ZSTD_VERSION_STRING, ZSTD_GIT_COMMIT_STRING, (U32)benchedSize, g_nbSeconds, (U32)(g_blockSize>>10));
 
     for (l=cLevel; l <= cLevelLast; l++) {
-        DISPLAYLEVEL(6, "BMK_benchCLevel: level %i", l);
+        if (l==0) continue;  /* skip level 0 */
         BMK_benchMem(srcBuffer, benchedSize,
                      displayName, l,
                      fileSizes, nbFiles,