diff --git a/lib/compress/zstd_lazy.c b/lib/compress/zstd_lazy.c
index 9937e24b..6d480496 100644
--- a/lib/compress/zstd_lazy.c
+++ b/lib/compress/zstd_lazy.c
@@ -85,7 +85,6 @@ static U32 ZSTD_insertBt1(ZSTD_CCtx* zc,
         if ((!extDict) || (matchIndex+matchLength >= dictLimit)) {
             assert(matchIndex+matchLength >= dictLimit);   /* might be wrong if extDict is incorrectly set to 0 */
             match = base + matchIndex;
-            //if (match[matchLength] == ip[matchLength]) matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
             matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend);
         } else {
             match = dictBase + matchIndex;
@@ -196,7 +195,6 @@ static size_t ZSTD_insertBtAndFindBestMatch (
 
         if ((!extDict) || (matchIndex+matchLength >= dictLimit)) {
             match = base + matchIndex;
-            //if (match[matchLength] == ip[matchLength]) matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iend) +1;
             matchLength += ZSTD_count(ip+matchLength, match+matchLength, iend);
         } else {
             match = dictBase + matchIndex;
diff --git a/lib/compress/zstd_opt.c b/lib/compress/zstd_opt.c
index 9eb338e1..b9a2cf85 100644
--- a/lib/compress/zstd_opt.c
+++ b/lib/compress/zstd_opt.c
@@ -345,7 +345,6 @@ U32 ZSTD_insertBtAndGetAllMatches (
         if ((!extDict) || (matchIndex+matchLength >= dictLimit)) {
             assert(matchIndex+matchLength >= dictLimit);  /* ensure the condition is correct when !extDict */
             match = base + matchIndex;
-            //if (match[matchLength] == ip[matchLength]) { matchLength += ZSTD_count(ip+matchLength+1, match+matchLength+1, iLimit) +1; }
             matchLength += ZSTD_count(ip+matchLength, match+matchLength, iLimit);
         } else {
             match = dictBase + matchIndex;
@@ -685,7 +684,7 @@ size_t ZSTD_compressBlock_btultra(ZSTD_CCtx* ctx, const void* src, size_t srcSiz
 
 size_t ZSTD_compressBlock_btopt_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)
 {
-    return ZSTD_compressBlock_opt_generic(ctx, src, srcSize, 1 /*optLevel*/, 1 /*extDict*/);
+    return ZSTD_compressBlock_opt_generic(ctx, src, srcSize, 0 /*optLevel*/, 1 /*extDict*/);
 }
 
 size_t ZSTD_compressBlock_btultra_extDict(ZSTD_CCtx* ctx, const void* src, size_t srcSize)