diff --git a/rpm-5.4.10-Multithreaded-XZ.patch b/rpm-5.4.10-Multithreaded-XZ.patch
new file mode 100644
index 0000000..7a6b77a
--- /dev/null
+++ b/rpm-5.4.10-Multithreaded-XZ.patch
@@ -0,0 +1,108 @@
+From 885436e995aa39249a7089bf1f850431ed318b7f Mon Sep 17 00:00:00 2001
+From: Mikhail Novosyolov <m.novosyolov@rosalinux.ru>
+Date: Tue, 25 Dec 2018 01:04:37 +0300
+Subject: [PATCH] Multithreaded XZ
+
+Ported commits 7740d1098642cd42f725fb9a2a3819ceaf51a80b and bec7592a36a2243aa4656afecf3247598baac5ff
+from RPM4 rpm-4.14.0-rc1 to RPM5 5.4.10 (ROSA)
+https://github.com/rpm-software-management/rpm/commit/7740d1098642cd42f725fb9a2a3819ceaf51a80b
+https://github.com/rpm-software-management/rpm/commit/bec7592a36a2243aa4656afecf3247598baac5ff
+---
+ rpmio/xzdio.c | 46 +++++++++++++++++++++++++++++++++++++++++++---
+ 1 file changed, 43 insertions(+), 3 deletions(-)
+
+diff --git a/rpmio/xzdio.c b/rpmio/xzdio.c
+index f7a078f..e33f3a4 100644
+--- a/rpmio/xzdio.c
++++ b/rpmio/xzdio.c
+@@ -7,6 +7,7 @@
+ #include "rpmio_internal.h"
+ #include <rpmmacro.h>
+ #include <rpmcb.h>
++#include <ctype.h>
+ 
+ #if defined(WITH_XZ)
+ 
+@@ -33,6 +34,10 @@
+ #endif
+ 
+ #include "lzma.h"
++/* Multithreading support in stable API since xz 5.2.0 */
++#if LZMA_VERSION >= 50020002
++#define HAVE_LZMA_MT
++#endif
+ 
+ #ifndef LZMA_PRESET_DEFAULT
+ #define LZMA_PRESET_DEFAULT     UINT32_C(6)
+@@ -68,7 +73,9 @@ static XZFILE *xzopen_internal(const char *path, const char *mode, int fdno, int
+     XZFILE *xzfile;
+     lzma_stream tmp;
+     lzma_ret ret;
+-
++#ifdef HAVE_LZMA_MT
++    int threads = 0;
++#endif
+     for (; *mode != '\0'; mode++) {
+ 	if (*mode == 'w')
+ 	    encoding = 1;
+@@ -76,6 +83,21 @@ static XZFILE *xzopen_internal(const char *path, const char *mode, int fdno, int
+ 	    encoding = 0;
+ 	else if (*mode >= '0' && *mode <= '9')
+ 	    level = (int)(*mode - '0');
++	else if (*mode == 'T') {
++	    if (isdigit(*(mode+1))) {
++#ifdef HAVE_LZMA_MT
++		threads = atoi(++mode);
++#endif
++		/* skip past rest of digits in string that atoi()
++		 * should've processed
++		 * */
++		while(isdigit(*++mode));
++	    }
++#ifdef HAVE_LZMA_MT
++	    else
++		    threads = -1;
++#endif
++	}
+     }
+     if (fdno != -1)
+ 	fp = fdopen(fdno, encoding ? "w" : "r");
+@@ -95,7 +117,26 @@ static XZFILE *xzopen_internal(const char *path, const char *mode, int fdno, int
+     xzfile->strm = tmp;
+     if (encoding) {
+ 	if (xz) {
+-	    ret = lzma_easy_encoder(&xzfile->strm, level, LZMA_CHECK_CRC32);
++#ifdef HAVE_LZMA_MT
++	    if (!threads) {
++#endif
++		ret = lzma_easy_encoder(&xzfile->strm, level, LZMA_CHECK_CRC32);
++#ifdef HAVE_LZMA_MT
++	    } else {
++		    if (threads == -1)
++		        threads = sysconf(_SC_NPROCESSORS_ONLN);
++	    	lzma_mt mt_options = {
++	    	    .flags = 0,
++	    	    .threads = threads,
++	    	    .block_size = 0,
++	    	    .timeout = 0,
++	    	    .preset = level,
++	    	    .filters = NULL,
++	    	    .check = LZMA_CHECK_SHA256 };
++
++	    	ret = lzma_stream_encoder_mt(&xzfile->strm, &mt_options);
++	    }
++#endif
+ 	} else {
+ 	    lzma_options_lzma options;
+ 	    (void) lzma_lzma_preset(&options, level);
+@@ -167,7 +208,6 @@ static int xzclose(/*@only@*/ XZFILE *xzfile)
+     lzma_ret ret;
+     size_t n;
+     int rc;
+-
+     if (!xzfile)
+ 	return -1;
+     if (xzfile->encoding) {
+-- 
+2.17.1
+
diff --git a/rpm.spec b/rpm.spec
index 10f771d..a3e430c 100644
--- a/rpm.spec
+++ b/rpm.spec
@@ -61,7 +61,7 @@ Summary:	The RPM package management system
 Name:		rpm
 Epoch:		1
 Version:	%{libver}.%{minorver}
-Release:	%{?prereldate:0.%{prereldate}.}80
+Release:	%{?prereldate:0.%{prereldate}.}81
 License:	LGPLv2.1+
 Group:		System/Configuration/Packaging
 Url:		http://rpm5.org/
@@ -530,6 +530,8 @@ Patch518:	rpm-5.4.10-fix-egg-info-provides.patch
 # On some modern files, 'file' reprots '... not stripped, too many notes'
 Patch519:	rpm-5.4.10-debuginfo-too-many-notes.patch
 
+Patch520:	rpm-5.4.10-Multithreaded-XZ.patch
+
 BuildRequires:	autoconf >= 2.57
 BuildRequires:	bzip2-devel
 BuildRequires:	automake >= 1.8
@@ -1195,6 +1197,8 @@ This package contains the RPM API documentation generated in HTML format.
 %patch518 -p1 -b .egg-info~
 %patch519 -p1 -b .debug_notes~
 
+%patch520 -p1 -b .MultithreadedXZ
+
 #required by P55, P80, P81, P94..
 ./autogen.sh