diff --git a/.travis.yml b/.travis.yml
index b20c43329..3c77a17e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,31 +4,35 @@ dist: trusty
 matrix:
   fast_finish: true
   include:
+    # other feature branches => short tests
+    - env: Cmd="make libc6install && make -C tests test32"
+    - env: Cmd='make valgrindinstall arminstall ppcinstall arm-ppc-compilation && make clean lib && CFLAGS="-O1 -g" make -C zlibWrapper valgrindTest && make -C tests valgrindTest'
+
+    - env: Cmd='CC=gcc-6 make gcc6install uasan-test'
+    - env: Cmd='CC=gcc-6 make gcc6install uasan-test32'
+    - env: Cmd="make arminstall armtest && make clean && make aarch64test"
+    - env: Cmd='make ppcinstall ppctest && make clean && make ppc64test'
+    - env: Cmd='make gpp6install zlibwrapper && make -C tests clean test-zstd-nolegacy && make -C tests versionsTest && make clean && cd contrib/pzstd && make test-pzstd && make test-pzstd32 && make test-pzstd-tsan && make test-pzstd-asan'
+      install:
+        - export CXX="g++-6" CC="gcc-6"
+
     # OS X Mavericks
     - env: Cmd="make gnu90test && make clean && make test && make clean && make travis-install"
       os: osx
 
-    # Ubuntu 14.04 LTS Server Edition 64 bit
-    - env: Cmd='make gpp6install uasan-test && cd contrib/pzstd && make test-pzstd && make test-pzstd32 && make test-pzstd-tsan && make test-pzstd-asan'
-      install:
-        - export CXX="g++-6" CC="gcc-6"
-    - env: Cmd='CC=gcc-6 make gcc6install uasan-test32 && make clean zlibwrapper && make -C tests clean test-zstd-nolegacy && make -C tests versionsTest'
-    - env: Cmd="make arminstall armtest && make clean && make aarch64test"
-    - env: Cmd='make ppcinstall ppctest && make clean && make ppc64test'
-
-    # other feature branches => short tests
-    - env: Cmd='make valgrindinstall arminstall ppcinstall arm-ppc-compilation && make clean lib && CFLAGS="-O1 -g" make -C zlibWrapper valgrindTest && make -C tests valgrindTest'
-    - env: Cmd="make libc6install && make -C tests test32"
-
 script:
   - JOB_NUMBER=$(echo $TRAVIS_JOB_NUMBER | sed -e 's:[0-9][0-9]*\.\(.*\):\1:')
-  #  cron & master          => long tests, as this is the final step towards a Release
-  #  dev && pull requests   => normal tests
-  #  other feature branches => short tests (number > 5)
+  #  cron & master          => full tests, as this is the final step towards a Release
+  #  pull requests          => normal tests (job numbers 1-3)
+  #  other feature branches => short tests (job numbers 1-2)
   - if [ "$TRAVIS_EVENT_TYPE" = "cron" ] || [ "$TRAVIS_BRANCH" = "master" ]; then
         FUZZERTEST=-T7mn sh -c "$Cmd" || travis_terminate 1;
     else
-        if [ "$TRAVIS_PULL_REQUEST" = "true" ] || [ $JOB_NUMBER -gt 5 ] || [ "$TRAVIS_BRANCH" = "dev" ]; then
+        if [ "$TRAVIS_PULL_REQUEST" == "true" ] && [ $JOB_NUMBER -lt 4 ]; then
             sh -c "$Cmd" || travis_terminate 1;
+        else
+            if [ $JOB_NUMBER -lt 3 ]; then
+                sh -c "$Cmd" || travis_terminate 1;
+            fi
         fi
     fi
diff --git a/doc/zstd_manual.html b/doc/zstd_manual.html
index 23224d77a..77e8974de 100644
--- a/doc/zstd_manual.html
+++ b/doc/zstd_manual.html
@@ -34,7 +34,7 @@
   zstd, short for Zstandard, is a fast lossless compression algorithm, targeting real-time compression scenarios
   at zlib-level and better compression ratios. The zstd compression library provides in-memory compression and
   decompression functions. The library supports compression levels from 1 up to ZSTD_maxCLevel() which is 22.
-  Levels >= 20, labelled `--ultra`, should be used with caution, as they require more memory.
+  Levels >= 20, labeled `--ultra`, should be used with caution, as they require more memory.
   Compression can be done in:
     - a single step (described as Simple API)
     - a single step, reusing a context (described as Explicit memory management)
@@ -306,8 +306,8 @@ typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; v
 </pre></b><BR>
 <a name="Chapter12"></a><h2>Compressed size functions</h2><pre></pre>
 
-<pre><b>size_t ZSTD_getFrameCompressedSize(const void* src, size_t srcSize);
-</b><p>  `src` should point to the start of a ZSTD encoded frame
+<pre><b>size_t ZSTD_findFrameCompressedSize(const void* src, size_t srcSize);
+</b><p>  `src` should point to the start of a ZSTD encoded frame or skippable frame
   `srcSize` must be at least as large as the frame
   @return : the compressed size of the frame pointed to by `src`, suitable to pass to
       `ZSTD_decompress` or similar, or an error code if given invalid input. 
@@ -321,7 +321,7 @@ typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; v
        to `ZSTD_frameHeaderSize_max` is guaranteed to be large enough in all cases.
    @return : decompressed size of the frame pointed to be `src` if known, otherwise
              - ZSTD_CONTENTSIZE_UNKNOWN if the size cannot be determined
-             - ZSTD_CONTENTSIZE_ERROR if an error occured (e.g. invalid magic number, srcSize too small) 
+             - ZSTD_CONTENTSIZE_ERROR if an error occurred (e.g. invalid magic number, srcSize too small) 
 </p></pre><BR>
 
 <pre><b>unsigned long long ZSTD_findDecompressedSize(const void* src, size_t srcSize);
@@ -365,7 +365,8 @@ typedef struct { ZSTD_allocFunction customAlloc; ZSTD_freeFunction customFree; v
 </p></pre><BR>
 
 <pre><b>typedef enum {
-    ZSTD_p_forceWindow   </b>/* Force back-references to remain < windowSize, even when referencing Dictionary content (default:0)*/<b>
+    ZSTD_p_forceWindow,   </b>/* Force back-references to remain < windowSize, even when referencing Dictionary content (default:0) */<b>
+    ZSTD_p_forceRawDict   </b>/* Force loading dictionary in "content-only" mode (no header analysis) */<b>
 } ZSTD_CCtxParameter;
 </b></pre><BR>
 <pre><b>size_t ZSTD_setCCtxParameter(ZSTD_CCtx* cctx, ZSTD_CCtxParameter param, unsigned value);
@@ -585,6 +586,9 @@ size_t ZSTD_compressEnd(ZSTD_CCtx* cctx, void* dst, size_t dstCapacity, const vo
   c) Frame Content - any content (User Data) of length equal to Frame Size
   For skippable frames ZSTD_decompressContinue() always returns 0.
   For skippable frames ZSTD_getFrameParams() returns fparamsPtr->windowLog==0 what means that a frame is skippable.
+    Note : If fparamsPtr->frameContentSize==0, it is ambiguous: the frame might actually be a Zstd encoded frame with no content.
+           For purposes of decompression, it is valid in both cases to skip the frame using
+           ZSTD_findFrameCompressedSize to find its size in bytes.
   It also returns Frame Size as fparamsPtr->frameContentSize.
 <BR></pre>
 
diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 0e0f9d373..d684e6a0d 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -62,6 +62,7 @@ struct ZSTD_CCtx_s {
     U32   hashLog3;         /* dispatch table : larger == faster, more memory */
     U32   loadedDictEnd;    /* index of end of dictionary */
     U32   forceWindow;      /* force back-references to respect limit of 1<<wLog, even for dictionary */
+    U32   forceRawDict;     /* Force loading dictionary in "content-only" mode (no header analysis) */
     ZSTD_compressionStage_e stage;
     U32   rep[ZSTD_REP_NUM];
     U32   repToConfirm[ZSTD_REP_NUM];
@@ -124,6 +125,7 @@ size_t ZSTD_setCCtxParameter(ZSTD_CCtx* cctx, ZSTD_CCtxParameter param, unsigned
     switch(param)
     {
     case ZSTD_p_forceWindow : cctx->forceWindow = value>0; cctx->loadedDictEnd = 0; return 0;
+    case ZSTD_p_forceRawDict : cctx->forceRawDict = value>0; return 0;
     default: return ERROR(parameter_unknown);
     }
 }
@@ -2613,8 +2615,9 @@ static size_t ZSTD_compress_insertDictionary(ZSTD_CCtx* zc, const void* dict, si
 {
     if ((dict==NULL) || (dictSize<=8)) return 0;
 
-    /* default : dict is pure content */
-    if (MEM_readLE32(dict) != ZSTD_DICT_MAGIC) return ZSTD_loadDictionaryContent(zc, dict, dictSize);
+    /* dict as pure content */
+    if ((MEM_readLE32(dict) != ZSTD_DICT_MAGIC) || (zc->forceRawDict))
+        return ZSTD_loadDictionaryContent(zc, dict, dictSize);
     zc->dictID = zc->params.fParams.noDictIDFlag ? 0 :  MEM_readLE32((const char*)dict+4);
 
     /* known magic number : dict is parsed for entropy stats and content */
diff --git a/lib/compress/zstdmt_compress.c b/lib/compress/zstdmt_compress.c
index 97d2b38ee..483ea157e 100644
--- a/lib/compress/zstdmt_compress.c
+++ b/lib/compress/zstdmt_compress.c
@@ -231,16 +231,17 @@ void ZSTDMT_compressChunk(void* jobDescription)
     const void* const src = (const char*)job->srcStart + job->dictSize;
     buffer_t const dstBuff = job->dstBuff;
     DEBUGLOG(3, "job (first:%u) (last:%u) : dictSize %u, srcSize %u", job->firstChunk, job->lastChunk, (U32)job->dictSize, (U32)job->srcSize);
-    if (job->cdict) {
+    if (job->cdict) {  /* should only happen for first segment */
         size_t const initError = ZSTD_compressBegin_usingCDict(job->cctx, job->cdict, job->fullFrameSize);
         if (job->cdict) DEBUGLOG(3, "using CDict ");
         if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; }
-    } else {
-        size_t const initError = ZSTD_compressBegin_advanced(job->cctx, job->srcStart, job->dictSize, job->params, job->fullFrameSize);
-        if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; }
+    } else {  /* srcStart points at reloaded section */
+        size_t const dictModeError = ZSTD_setCCtxParameter(job->cctx, ZSTD_p_forceRawDict, 1);  /* Force loading dictionary in "content-only" mode (no header analysis) */
+        size_t const initError = ZSTD_compressBegin_advanced(job->cctx, job->srcStart, job->dictSize, job->params, 0);
+        if (ZSTD_isError(initError) || ZSTD_isError(dictModeError)) { job->cSize = initError; goto _endJob; }
         ZSTD_setCCtxParameter(job->cctx, ZSTD_p_forceWindow, 1);
     }
-    if (!job->firstChunk) {  /* flush frame header */
+    if (!job->firstChunk) {  /* flush and overwrite frame header when it's not first segment */
         size_t const hSize = ZSTD_compressContinue(job->cctx, dstBuff.start, dstBuff.size, src, 0);
         if (ZSTD_isError(hSize)) { job->cSize = hSize; goto _endJob; }
         ZSTD_invalidateRepCodes(job->cctx);
@@ -248,7 +249,7 @@ void ZSTDMT_compressChunk(void* jobDescription)
 
     DEBUGLOG(4, "Compressing : ");
     DEBUG_PRINTHEX(4, job->srcStart, 12);
-    job->cSize = (job->lastChunk) ?   /* last chunk signal */
+    job->cSize = (job->lastChunk) ?
                  ZSTD_compressEnd     (job->cctx, dstBuff.start, dstBuff.size, src, job->srcSize) :
                  ZSTD_compressContinue(job->cctx, dstBuff.start, dstBuff.size, src, job->srcSize);
     DEBUGLOG(3, "compressed %u bytes into %u bytes   (first:%u) (last:%u)", (unsigned)job->srcSize, (unsigned)job->cSize, job->firstChunk, job->lastChunk);
diff --git a/lib/zstd.h b/lib/zstd.h
index e597c5db5..7cca36909 100644
--- a/lib/zstd.h
+++ b/lib/zstd.h
@@ -462,7 +462,8 @@ ZSTDLIB_API ZSTD_CCtx* ZSTD_createCCtx_advanced(ZSTD_customMem customMem);
 ZSTDLIB_API size_t ZSTD_sizeof_CCtx(const ZSTD_CCtx* cctx);
 
 typedef enum {
-    ZSTD_p_forceWindow   /* Force back-references to remain < windowSize, even when referencing Dictionary content (default:0)*/
+    ZSTD_p_forceWindow,   /* Force back-references to remain < windowSize, even when referencing Dictionary content (default:0) */
+    ZSTD_p_forceRawDict   /* Force loading dictionary in "content-only" mode (no header analysis) */
 } ZSTD_CCtxParameter;
 /*! ZSTD_setCCtxParameter() :
  *  Set advanced parameters, selected through enum ZSTD_CCtxParameter
diff --git a/tests/.gitignore b/tests/.gitignore
index dc468dee4..f408a7491 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -9,6 +9,8 @@ zbufftest32
 zbufftest-dll
 zstreamtest
 zstreamtest32
+zstreamtest_asan
+zstreamtest_tsan
 zstreamtest-dll
 datagen
 paramgrill
diff --git a/tests/Makefile b/tests/Makefile
index 5b0e29c67..30b2a04a3 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -35,22 +35,28 @@ FLAGS    = $(CPPFLAGS) $(CFLAGS) $(LDFLAGS)
 
 
 ZSTDCOMMON_FILES := $(ZSTDDIR)/common/*.c
-ZSTDCOMP_FILES := $(ZSTDDIR)/compress/*.c
+ZSTDCOMP_FILES   := $(ZSTDDIR)/compress/*.c
 ZSTDDECOMP_FILES := $(ZSTDDIR)/decompress/*.c
-ZSTD_FILES := $(ZSTDDECOMP_FILES) $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES)
+ZSTD_FILES  := $(ZSTDDECOMP_FILES) $(ZSTDCOMMON_FILES) $(ZSTDCOMP_FILES)
 ZBUFF_FILES := $(ZSTDDIR)/deprecated/*.c
 ZDICT_FILES := $(ZSTDDIR)/dictBuilder/*.c
 
+ZSTD_OBJ  := $(patsubst %.c,%.o, $(wildcard $(ZSTD_FILES)) )
+ZBUFF_OBJ := $(patsubst %.c,%.o, $(wildcard $(ZBUFF_FILES)) )
+ZDICT_OBJ := $(patsubst %.c,%.o, $(wildcard $(ZDICT_FILES)) )
 
 
 # Define *.exe as extension for Windows systems
 ifneq (,$(filter Windows%,$(OS)))
 EXT =.exe
-MULTITHREAD = -DZSTD_MULTITHREAD
+MULTITHREAD_CPP = -DZSTD_MULTITHREAD
+MULTITHREAD_LD  =
 else
 EXT =
-MULTITHREAD = -pthread -DZSTD_MULTITHREAD
+MULTITHREAD_CPP = -DZSTD_MULTITHREAD
+MULTITHREAD_LD  = -pthread
 endif
+MULTITHREAD = $(MULTITHREAD_CPP) $(MULTITHREAD_LD)
 
 VOID = /dev/null
 ZSTREAM_TESTTIME = -T2mn
@@ -124,11 +130,23 @@ zbufftest-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c zbufftest.c
 	$(MAKE) -C $(ZSTDDIR) libzstd
 	$(CC) $(CPPFLAGS) $(CFLAGS) $^ $(LDFLAGS) -o $@$(EXT)
 
-zstreamtest  : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c zstreamtest.c
-	$(CC)      $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
+ZSTREAMFILES := $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c zstreamtest.c
+zstreamtest : CPPFLAGS += $(MULTITHREAD_CPP)
+zstreamtest : LDFLAGS += $(MULTITHREAD_LD)
+zstreamtest : $(ZSTREAMFILES)
+	$(CC) $(FLAGS) $^ -o $@$(EXT)
 
-zstreamtest32 : $(ZSTD_FILES) $(ZDICT_FILES) $(PRGDIR)/datagen.c zstreamtest.c
-	$(CC) -m32  $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
+zstreamtest32 : CFLAGS += -m32
+zstreamtest32 : $(ZSTREAMFILES)
+	$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
+
+zstreamtest_asan : CFLAGS += -fsanitize=address
+zstreamtest_asan : $(ZSTREAMFILES)
+	$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
+
+zstreamtest_tsan : CFLAGS += -fsanitize=thread
+zstreamtest_tsan : $(ZSTREAMFILES)
+	$(CC) $(FLAGS) $(MULTITHREAD) $^ -o $@$(EXT)
 
 zstreamtest-dll : LDFLAGS+= -L$(ZSTDDIR) -lzstd
 zstreamtest-dll : $(ZSTDDIR)/common/xxhash.c $(PRGDIR)/datagen.c zstreamtest.c
diff --git a/tests/decodecorpus.c b/tests/decodecorpus.c
index ecac7b234..183d20f74 100644
--- a/tests/decodecorpus.c
+++ b/tests/decodecorpus.c
@@ -611,7 +611,7 @@ static U32 generateSequences(U32* seed, frame_t* frame, seqStore_t* seqStore,
     size_t const remainingMatch = contentSize - literalsSize;
     size_t excessMatch = 0;
     U32 numSequences = 0;
-
+  
     U32 i;
 
 
diff --git a/zlibWrapper/zstd_zlibwrapper.h b/zlibWrapper/zstd_zlibwrapper.h
index 382716921..0ebd87612 100644
--- a/zlibWrapper/zstd_zlibwrapper.h
+++ b/zlibWrapper/zstd_zlibwrapper.h
@@ -30,7 +30,13 @@ const char * zstdVersion(void);
 
 
 /*** COMPRESSION ***/
-/* enables/disables zstd compression during runtime */
+/* ZWRAP_useZSTDcompression() enables/disables zstd compression during runtime.
+   By default zstd compression is disabled. To enable zstd compression please use one of the methods:
+   - compilation with the additional option -DZWRAP_USE_ZSTD=1 
+   - using '#define ZWRAP_USE_ZSTD 1' in source code before '#include "zstd_zlibwrapper.h"'
+   - calling ZWRAP_useZSTDcompression(1)
+   All above-mentioned methods will enable zstd compression for all threads.
+   Be aware that ZWRAP_useZSTDcompression() is not thread-safe and may lead to a race condition. */
 void ZWRAP_useZSTDcompression(int turn_on);
 
 /* checks if zstd compression is turned on */
@@ -54,7 +60,11 @@ int ZWRAP_deflateReset_keepDict(z_streamp strm);
 /*** DECOMPRESSION ***/
 typedef enum { ZWRAP_FORCE_ZLIB, ZWRAP_AUTO } ZWRAP_decompress_type;
 
-/* enables/disables automatic recognition of zstd/zlib compressed data during runtime */
+/* ZWRAP_setDecompressionType() enables/disables automatic recognition of zstd/zlib compressed data during runtime.
+   By default auto-detection of zstd and zlib streams in enabled (ZWRAP_AUTO).
+   Forcing zlib decompression with ZWRAP_setDecompressionType(ZWRAP_FORCE_ZLIB) slightly improves
+   decompression speed of zlib-encoded streams.
+   Be aware that ZWRAP_setDecompressionType() is not thread-safe and may lead to a race condition. */
 void ZWRAP_setDecompressionType(ZWRAP_decompress_type type);
 
 /* checks zstd decompression type */