diff --git a/depends/Makefile b/depends/Makefile
index 6916cadab..302cb2fcb 100644
--- a/depends/Makefile
+++ b/depends/Makefile
@@ -1,234 +1,241 @@
 .NOTPARALLEL :
 
 # Pattern rule to print variables, e.g. make print-build_arch
 print-%:
 	@echo $* = $($*)
 
 SOURCES_PATH ?= $(BASEDIR)/sources
 WORK_PATH = $(BASEDIR)/work
 BASE_CACHE ?= $(BASEDIR)/built
 SDK_PATH ?= $(BASEDIR)/SDKs
 NO_QT ?=
 NO_PROTOBUF ?=
 NO_QR ?=
 RAPIDCHECK ?=
 NO_WALLET ?=
 NO_ZMQ ?=
 NO_UPNP ?=
+NO_JEMALLOC ?=
 FALLBACK_DOWNLOAD_PATH ?= https://download.bitcoinabc.org/depends-sources
 
 BUILD = $(shell ./config.guess)
 HOST ?= $(BUILD)
 PATCHES_PATH = $(BASEDIR)/patches
 BASEDIR = $(CURDIR)
 HASH_LENGTH:=11
 DOWNLOAD_CONNECT_TIMEOUT:=30
 DOWNLOAD_RETRIES:=3
 HOST_ID_SALT ?= salt
 BUILD_ID_SALT ?= salt
 JOBS ?= $(shell echo $$(($(shell nproc 2> /dev/null || sysctl -n hw.ncpu 2> /dev/null || echo 0) + 1)))
 
 host:=$(BUILD)
 ifneq ($(HOST),)
 host:=$(HOST)
 host_toolchain:=$(HOST)-
 endif
 
 ifneq ($(DEBUG),)
 release_type=debug
 else
 release_type=release
 endif
 
 base_build_dir=$(WORK_PATH)/build
 base_staging_dir=$(WORK_PATH)/staging
 base_download_dir=$(WORK_PATH)/download
 canonical_host:=$(shell ./config.sub $(HOST))
 build:=$(shell ./config.sub $(BUILD))
 
 build_arch =$(firstword $(subst -, ,$(build)))
 build_vendor=$(word 2,$(subst -, ,$(build)))
 full_build_os:=$(subst $(build_arch)-$(build_vendor)-,,$(build))
 build_os:=$(findstring linux,$(full_build_os))
 build_os+=$(findstring darwin,$(full_build_os))
 build_os:=$(strip $(build_os))
 ifeq ($(build_os),)
 build_os=$(full_build_os)
 endif
 
 host_arch=$(firstword $(subst -, ,$(canonical_host)))
 host_vendor=$(word 2,$(subst -, ,$(canonical_host)))
 full_host_os:=$(subst $(host_arch)-$(host_vendor)-,,$(canonical_host))
 host_os:=$(findstring linux,$(full_host_os))
 host_os+=$(findstring darwin,$(full_host_os))
 host_os+=$(findstring mingw32,$(full_host_os))
 host_os:=$(strip $(host_os))
 ifeq ($(host_os),)
 host_os=$(full_host_os)
 endif
 
 $(host_arch)_$(host_os)_prefix=$(BASEDIR)/$(host)
 $(host_arch)_$(host_os)_host=$(host)
 host_prefix=$($(host_arch)_$(host_os)_prefix)
 build_prefix=$(host_prefix)/native
 build_host=$(build)
 
 AT_$(V):=
 AT_:=@
 AT:=$(AT_$(V))
 
 all: install
 
 include hosts/$(host_os).mk
 include hosts/default.mk
 include builders/$(build_os).mk
 include builders/default.mk
 include packages/packages.mk
 
 build_id_string:=$(BUILD_ID_SALT)
 build_id_string+=$(shell $(build_CC) --version 2>/dev/null)
 build_id_string+=$(shell $(build_AR) --version 2>/dev/null)
 build_id_string+=$(shell $(build_CXX) --version 2>/dev/null)
 build_id_string+=$(shell $(build_RANLIB) --version 2>/dev/null)
 build_id_string+=$(shell $(build_STRIP) --version 2>/dev/null)
 
 $(host_arch)_$(host_os)_id_string:=$(HOST_ID_SALT)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_CC) --version 2>/dev/null)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_AR) --version 2>/dev/null)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_CXX) --version 2>/dev/null)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_RANLIB) --version 2>/dev/null)
 $(host_arch)_$(host_os)_id_string+=$(shell $(host_STRIP) --version 2>/dev/null)
 
 qrencode_packages_$(NO_QR) = $(qrencode_packages)
 
 qt_packages_$(NO_QT) = $(qt_packages) $(qt_$(host_os)_packages) $(qt_$(host_arch)_$(host_os)_packages) $(qrencode_packages_)
 
 wallet_packages_$(NO_WALLET) = $(wallet_packages)
 upnp_packages_$(NO_UPNP) = $(upnp_packages)
 zmq_packages_$(NO_ZMQ) = $(zmq_packages)
 
 protobuf_packages_$(NO_PROTOBUF) = $(protobuf_packages)
 rapidcheck_packages_$(RAPIDCHECK) = $(rapidcheck_packages)
 
+jemalloc_packages_$(NO_JEMALLOC) = $(jemalloc_packages)
+
 packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(qt_packages_) $(wallet_packages_) $(upnp_packages_)
 native_packages += $($(host_arch)_$(host_os)_native_packages) $($(host_os)_native_packages)
 
 ifneq ($(protobuf_packages_),)
 native_packages += $(protobuf_native_packages)
 packages += $(protobuf_packages)
 endif
 
 ifneq ($(zmq_packages_),)
 packages += $(zmq_packages)
 endif
 
 ifeq ($(rapidcheck_packages_),)
 packages += $(rapidcheck_packages)
 endif
 
+ifneq ($(jemalloc_packages_),)
+packages += $(jemalloc_packages)
+endif
+
 all_packages = $(packages) $(native_packages)
 
 meta_depends = Makefile funcs.mk builders/default.mk hosts/default.mk hosts/$(host_os).mk builders/$(build_os).mk
 
 $(host_arch)_$(host_os)_native_toolchain?=$($(host_os)_native_toolchain)
 
 include funcs.mk
 
 toolchain_path=$($($(host_arch)_$(host_os)_native_toolchain)_prefixbin)
 final_build_id_long+=$(shell $(build_SHA256SUM) config.site.in)
 final_build_id+=$(shell echo -n "$(final_build_id_long)" | $(build_SHA256SUM) | cut -c-$(HASH_LENGTH))
 $(host_prefix)/.stamp_$(final_build_id): $(native_packages) $(packages)
 	$(AT)rm -rf $(@D)
 	$(AT)mkdir -p $(@D)
 	$(AT)echo copying packages: $^
 	$(AT)echo to: $(@D)
 	$(AT)cd $(@D); $(foreach package,$^, tar xf $($(package)_cached); )
 	$(AT)touch $@
 
 $(host_prefix)/share/config.site : config.site.in $(host_prefix)/.stamp_$(final_build_id)
 	$(AT)@mkdir -p $(@D)
 	$(AT)sed -e 's|@HOST@|$(host)|' \
             -e 's|@CC@|$(toolchain_path)$(host_CC)|' \
             -e 's|@CXX@|$(toolchain_path)$(host_CXX)|' \
             -e 's|@AR@|$(toolchain_path)$(host_AR)|' \
             -e 's|@RANLIB@|$(toolchain_path)$(host_RANLIB)|' \
             -e 's|@NM@|$(toolchain_path)$(host_NM)|' \
             -e 's|@STRIP@|$(toolchain_path)$(host_STRIP)|' \
             -e 's|@build_os@|$(build_os)|' \
             -e 's|@host_os@|$(host_os)|' \
             -e 's|@CFLAGS@|$(strip $(host_CFLAGS) $(host_$(release_type)_CFLAGS))|' \
             -e 's|@CXXFLAGS@|$(strip $(host_CXXFLAGS) $(host_$(release_type)_CXXFLAGS))|' \
             -e 's|@CPPFLAGS@|$(strip $(host_CPPFLAGS) $(host_$(release_type)_CPPFLAGS))|' \
             -e 's|@LDFLAGS@|$(strip $(host_LDFLAGS) $(host_$(release_type)_LDFLAGS))|' \
             -e 's|@no_qt@|$(NO_QT)|' \
             -e 's|@no_qr@|$(NO_QR)|' \
             -e 's|@no_zmq@|$(NO_ZMQ)|' \
             -e 's|@no_bip70@|$(NO_PROTOBUF)|' \
             -e 's|@no_wallet@|$(NO_WALLET)|' \
             -e 's|@no_upnp@|$(NO_UPNP)|' \
             -e 's|@debug@|$(DEBUG)|' \
             $< > $@
 	$(AT)touch $@
 
 
 define check_or_remove_cached
   mkdir -p $(BASE_CACHE)/$(host)/$(package) && cd $(BASE_CACHE)/$(host)/$(package); \
   $(build_SHA256SUM) -c $($(package)_cached_checksum) >/dev/null 2>/dev/null || \
   ( rm -f $($(package)_cached_checksum); \
     if test -f "$($(package)_cached)"; then echo "Checksum mismatch for $(package). Forcing rebuild.."; rm -f $($(package)_cached_checksum) $($(package)_cached); fi )
 endef
 
 define check_or_remove_sources
   mkdir -p $($(package)_source_dir); cd $($(package)_source_dir); \
   test -f $($(package)_fetched) && ( $(build_SHA256SUM) -c $($(package)_fetched) >/dev/null 2>/dev/null || \
     ( echo "Checksum missing or mismatched for $(package) source. Forcing re-download."; \
       rm -f $($(package)_all_sources) $($(1)_fetched))) || true
 endef
 
 check-packages:
 	@$(foreach package,$(all_packages),$(call check_or_remove_cached,$(package));)
 check-sources:
 	@$(foreach package,$(all_packages),$(call check_or_remove_sources,$(package));)
 
 $(host_prefix)/share/config.site: check-packages
 
 check-packages: check-sources
 
 clean-all: clean
 	@rm -rf $(SOURCES_PATH) x86_64* i686* arm* aarch64*
 
 clean:
 	@rm -rf $(WORK_PATH) $(BASE_CACHE) $(BUILD)
 
 install: check-packages $(host_prefix)/share/config.site
 
 download-one: check-sources $(all_sources)
 
 download-osx:
 	@$(MAKE) -s HOST=x86_64-apple-darwin16 download-one
 download-linux:
 	@$(MAKE) -s HOST=x86_64-unknown-linux-gnu download-one
 download-win:
 	@$(MAKE) -s HOST=x86_64-w64-mingw32 download-one
 download: download-osx download-linux download-win
 
 build-linux64: download-linux
 	@$(MAKE) -s HOST=x86_64-linux-gnu install
 build-linux32: download-linux
 	@$(MAKE) -s HOST=i686-pc-linux-gnu install
 build-linux-arm: download-linux
 	@$(MAKE) -s HOST=arm-linux-gnueabihf install
 build-linux-aarch64: download-linux
 	@$(MAKE) -s HOST=aarch64-linux-gnu install
 build-osx: download-osx
 	@$(MAKE) -s HOST=x86_64-apple-darwin16 install
 build-win32: download-win
 	@$(MAKE) -s HOST=i686-w64-mingw32 install
 build-win64: download-win
 	@$(MAKE) -s HOST=x86_64-w64-mingw32 install
 
 build-all: build-linux64 build-linux32 build-linux-arm build-linux-aarch64 build-osx build-win32 build-win64
 
 $(foreach package,$(all_packages),$(eval $(call ext_add_stages,$(package))))
 
 .PHONY: install cached clean clean-all download-one download-osx download-linux download-win download check-packages check-sources
diff --git a/depends/README.md b/depends/README.md
index a8d8f9f18..28fb6b7a8 100644
--- a/depends/README.md
+++ b/depends/README.md
@@ -1,117 +1,118 @@
 ### Usage
 
 To build dependencies for the current arch+OS:
 
     make
 
 To build for another arch/OS:
 
     make build-<platform>
 
 Where `<platform>` is one of the following:
  - linux64
  - linux32
  - linux-arm
  - linux-aarch64
  - osx
  - win64
 
 For example, building the dependencies for macOS:
 
     make build-osx
 
 Note that it will use all the CPU cores available on the machine by default.
 This behavior can be changed by setting the `JOBS` environment variable (see
 below).
 
 To use the dependencies for building Bitcoin ABC, you need to set the platform
 file to be used by `cmake`.
 The platform files are located under `cmake/platforms/`.
 For example, cross-building for macOS (run from the project root):
 
     mkdir build_osx
     cd build_osx
     cmake -GNinja .. -DCMAKE_TOOLCHAIN_FILE=../cmake/platforms/OSX.cmake
     ninja
 
 No other options are needed, the paths are automatically configured.
 
 ### Install the required dependencies: Ubuntu & Debian
 
 #### Common to all arch/OS
 
     sudo apt-get install build-essential autoconf automake cmake curl git libtool ninja-build patch pkg-config python3
 
 #### For macOS cross compilation
 
     sudo apt-get install imagemagick libbz2-dev libcap-dev librsvg2-bin libtiff-tools python3-setuptools
 
 #### For Win64 cross compilation
 
 - see [build-windows.md](../doc/build-windows.md#cross-compilation-for-ubuntu-and-windows-subsystem-for-linux)
 
 #### For linux cross compilation
 
 Common linux dependencies:
 
     sudo apt-get install gperf
 
 For linux 32 bits cross compilation:
 
 First add the i386 architecture to `dpkg`:
 
     sudo dpkg --add-architecture i386
     sudo apt-get update
 
 Then install the dependencies:
 
     sudo apt-get install lib32stdc++-8-dev libc6-dev:i386
 
 For linux ARM cross compilation:
 
     sudo apt-get install g++-arm-linux-gnueabihf
 
 For linux AARCH64 cross compilation:
 
     sudo apt-get install g++-aarch64-linux-gnu
 
 
 ### Dependency Options
 
 The following can be set when running make: make FOO=bar
 
     SOURCES_PATH: downloaded sources will be placed here
     BASE_CACHE: built packages will be placed here
     SDK_PATH: Path where sdk's can be found (used by macOS)
     FALLBACK_DOWNLOAD_PATH: If a source file can't be fetched, try here before giving up
     NO_QT: Don't download/build/cache qt and its dependencies
     NO_QR: Don't download/build/cache packages needed for enabling qrencode
     NO_ZMQ: Don't download/build/cache packages needed for enabling zeromq
     NO_WALLET: Don't download/build/cache libs needed to enable the wallet
     NO_UPNP: Don't download/build/cache packages needed for enabling upnp
+    NO_JEMALLOC: Don't download/build/cache jemalloc
     DEBUG: disable some optimizations and enable more runtime checking
     RAPIDCHECK: build rapidcheck (experimental, requires cmake)
     NO_PROTOBUF: Don't download/build/cache protobuf (used for BIP70 support)
     HOST_ID_SALT: Optional salt to use when generating host package ids
     BUILD_ID_SALT: Optional salt to use when generating build package ids
     JOBS: Number of jobs to use for each package build
 
 If some packages are not built, for example by building the depends with
 `make NO_WALLET=1`, the appropriate options should be set when building Bitcoin
 ABC using these dependencies.
 In this example, `-DBUILD_BITCOIN_WALLET=OFF` should be passed to the `cmake`
 command line to ensure that the build will not fail due to missing dependencies.
 
 Additional targets:
 
     download: run 'make download' to fetch all sources without building them
     download-osx: run 'make download-osx' to fetch all sources needed for macOS builds
     download-win: run 'make download-win' to fetch all sources needed for win builds
     download-linux: run 'make download-linux' to fetch all sources needed for linux builds
     build-all: build the dependencies for all the arch/OS
 
 ### Other documentation
 
 - [description.md](description.md): General description of the depends system
 - [packages.md](packages.md): Steps for adding packages
 
diff --git a/depends/packages/jemalloc.mk b/depends/packages/jemalloc.mk
new file mode 100644
index 000000000..aa0f03766
--- /dev/null
+++ b/depends/packages/jemalloc.mk
@@ -0,0 +1,21 @@
+package=jemalloc
+$(package)_version=5.2.1
+$(package)_download_path=https://github.com/jemalloc/jemalloc/releases/download/$($(package)_version)
+$(package)_file_name=jemalloc-$($(package)_version).tar.bz2
+$(package)_sha256_hash=34330e5ce276099e2e8950d9335db5a875689a4c6a56751ef3b1d8c537f887f6
+
+define $(package)_set_vars
+$(package)_config_opts=--disable-libdl --disable-shared --enable-cxx --enable-option-checking
+endef
+
+define $(package)_config_cmds
+  $($(package)_autoconf)
+endef
+
+define $(package)_build_cmds
+  $(MAKE) -j$(JOBS)
+endef
+
+define $(package)_stage_cmds
+  $(MAKE) DESTDIR=$($(package)_staging_dir) install
+endef
diff --git a/depends/packages/packages.mk b/depends/packages/packages.mk
index b53f783af..f3795b724 100644
--- a/depends/packages/packages.mk
+++ b/depends/packages/packages.mk
@@ -1,27 +1,29 @@
 packages:=boost openssl libevent
 
 protobuf_native_packages = native_protobuf
 protobuf_packages = protobuf
 
 qt_packages = zlib
 
 qrencode_packages = qrencode
 
 qt_linux_packages:=qt expat libxcb xcb_proto libXau xproto freetype fontconfig
 
 rapidcheck_packages = rapidcheck
 
 qt_darwin_packages=qt
 qt_mingw32_packages=qt
 
 wallet_packages=bdb
 
 zmq_packages=zeromq
 
 upnp_packages=miniupnpc
 
 darwin_native_packages = native_biplist native_ds_store native_mac_alias
 
 ifneq ($(build_os),darwin)
 darwin_native_packages += native_cctools native_cdrkit native_libdmg-hfsplus
 endif
+
+jemalloc_packages = jemalloc
diff --git a/doc/dependencies.md b/doc/dependencies.md
index 8c9385625..a8c8b1269 100644
--- a/doc/dependencies.md
+++ b/doc/dependencies.md
@@ -1,48 +1,49 @@
 Dependencies
 ============
 
 These are the dependencies currently used by Bitcoin ABC. You can find instructions for installing them in the `build-*.md` file for your platform.
 
 | Dependency | Version used | Minimum required | CVEs | Shared | [Bundled Qt library](https://doc.qt.io/qt-5/configure-options.html) |
 | --- | --- | --- | --- | --- | --- |
 | Berkeley DB | [5.3.28](http://www.oracle.com/technetwork/database/database-technologies/berkeleydb/downloads/index.html) | 5.3 | No |  |  |
 | Boost | [1.70.0](https://www.boost.org/users/download/) | 1.58.0 | No |  |  |
 | Clang |  | [3.4](https://releases.llvm.org/download.html) (C++14 support) |  |  |  |
 | CMake |  | [3.13](https://cmake.org/download/) |  |  |  |
 | Expat | [2.2.7](https://libexpat.github.io/) |  | No | Yes |  |
 | fontconfig | [2.12.6](https://www.freedesktop.org/software/fontconfig/release/) |  | No | Yes |  |
 | FreeType | [2.7.1](http://download.savannah.gnu.org/releases/freetype) |  | No |  |  |
 | GCC |  | [5.0](https://gcc.gnu.org/) (C++14 support) |  |  |  |
 | HarfBuzz-NG |  |  |  |  |  |
+| jemalloc | [5.2.1](https://github.com/jemalloc/jemalloc/releases) |  |  |  |  |
 | libevent | [2.1.11-stable](https://github.com/libevent/libevent/releases) | 2.0.22 | No |  |  |
 | libpng |  |  |  |  | Yes |
 | libsrvg | |  |  |  |  |
 | MiniUPnPc | [2.0.20180203](http://miniupnp.free.fr/files) | 1.5 | No |  |  |
 | Ninja |  | [1.5.1](https://github.com/ninja-build/ninja/releases) |  |  |  |
 | OpenSSL | [1.0.1k](https://www.openssl.org/source) |  | Yes |  |  |
 | PCRE |  |  |  |  | Yes |
 | protobuf | [2.6.1](https://github.com/google/protobuf/releases) |  | No |  |  |
 | Python (tests) |  | [3.5](https://www.python.org/downloads) |  |  |  |
 | qrencode | [3.4.4](https://fukuchi.org/works/qrencode) |  | No |  |  |
 | Qt | [5.9.7](https://download.qt.io/official_releases/qt/) | 5.5.1 | No |  |  |
 | XCB |  |  |  |  | Yes (Linux only) |
 | xkbcommon |  |  |  |  | Yes (Linux only) |
 | ZeroMQ | [4.3.1](https://github.com/zeromq/libzmq/releases) | 4.1.5 | No |  |  |
 | zlib | [1.2.11](http://zlib.net/) |  |  |  | No |
 
 Controlling dependencies
 ------------------------
 Some dependencies are not needed in all configurations. The following are some
 factors that affect the dependency list.
 
 #### Options passed to `cmake`
 * MiniUPnPc is not needed with  `-DENABLE_UPNP=OFF`.
 * Berkeley DB is not needed with `-DBUILD_BITCOIN_WALLET=OFF`.
 * protobuf is not needed with `-DENABLE_BIP70=OFF`.
 * Qt is not needed with `-DBUILD_BITCOIN_QT=OFF`.
 * qrencode is not needed with `-DENABLE_QRCODE=OFF`.
 * ZeroMQ is not needed with the `-DBUILD_BITCOIN_ZMQ=OFF`.
 
 #### Other
 * librsvg is only needed if you need to run `ninja osx-dmg` on
   (cross-compilation to) macOS.