diff --git a/.cargo/config b/.cargo/config
index 564b1fb152..c81c668c82 100644
--- a/.cargo/config
+++ b/.cargo/config
@@ -1,5 +1,5 @@
 [env]
-JEMALLOC_SYS_WITH_MALLOC_CONF = "percpu_arena:percpu,oversize_threshold:0,background_thread:true,metadata_thp:auto,dirty_decay_ms:5000,muzzy_decay_ms:5000"
+JEMALLOC_SYS_WITH_MALLOC_CONF = "background_thread:true,narenas:1,tcache:false,dirty_decay_ms:0,muzzy_decay_ms:0,metadata_thp:auto"
 
 [target.'cfg(all())']
 rustflags = [ "-Zshare-generics=y" ]
diff --git a/.github/workflows/dev-build.yml b/.github/workflows/dev-build.yml
index 7bbb5f5f92..900048e6ae 100644
--- a/.github/workflows/dev-build.yml
+++ b/.github/workflows/dev-build.yml
@@ -7,14 +7,19 @@ on:
     branches:
       - dev
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
  MANUAL_MM_VERSION: true
+ JEMALLOC_SYS_WITH_MALLOC_CONF: 'background_thread:true,narenas:1,tcache:false,dirty_decay_ms:0,muzzy_decay_ms:0,metadata_thp:auto'
 
 jobs:
   linux-x86-64:
     timeout-minutes: 30
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -193,7 +198,7 @@ jobs:
 
   wasm:
     timeout-minutes: 30
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -281,7 +286,7 @@ jobs:
 
   android-aarch64:
     timeout-minutes: 30
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -329,7 +334,7 @@ jobs:
 
   android-armv7:
     timeout-minutes: 30
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -380,7 +385,7 @@ jobs:
     if: github.event_name != 'pull_request'
     needs: linux-x86-64
     timeout-minutes: 15
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
 
diff --git a/.github/workflows/fmt-and-lint.yml b/.github/workflows/fmt-and-lint.yml
index 6ee8a2c1a2..b9c5c92701 100644
--- a/.github/workflows/fmt-and-lint.yml
+++ b/.github/workflows/fmt-and-lint.yml
@@ -9,6 +9,10 @@ on:
       - main
       - dev
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   fmt-and-lint:
     timeout-minutes: 45
diff --git a/.github/workflows/release-build.yml b/.github/workflows/release-build.yml
index 21820340a1..9cf009f810 100644
--- a/.github/workflows/release-build.yml
+++ b/.github/workflows/release-build.yml
@@ -4,14 +4,19 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
  BRANCH_NAME: ${{ github.head_ref || github.ref_name }}
  MANUAL_MM_VERSION: true
+ JEMALLOC_SYS_WITH_MALLOC_CONF: 'background_thread:true,narenas:1,tcache:false,dirty_decay_ms:0,muzzy_decay_ms:0,metadata_thp:auto'
 
 jobs:
   linux-x86-64:
     timeout-minutes: 60
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -188,7 +193,7 @@ jobs:
 
   wasm:
     timeout-minutes: 60
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -276,7 +281,7 @@ jobs:
 
   android-aarch64:
     timeout-minutes: 60
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
@@ -324,7 +329,7 @@ jobs:
 
   android-armv7:
     timeout-minutes: 60
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-18.04
     steps:
     - uses: actions/checkout@v3
     - name: Install toolchain
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ae9b84fe07..5cd82b5311 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,6 +9,10 @@ on:
       - main
       - dev
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 env:
  FROM_SHARED_RUNNER: true
 
diff --git a/.github/workflows/virustotal_scan.yml b/.github/workflows/virustotal_scan.yml
index 551990ddc0..b292e47050 100644
--- a/.github/workflows/virustotal_scan.yml
+++ b/.github/workflows/virustotal_scan.yml
@@ -4,6 +4,10 @@ on:
   release:
     types: [created, edited, released, published]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   virustotal:
     runs-on: ubuntu-latest
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08907103bd..94ef07eb01 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,7 +31,6 @@
 - CI/CD migrated from Azure to Github runners [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
 - CI tests are much stabilized [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
 - Integration and unit tests are seperated on CI stack [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
-- Jemalloc configuration updated for optimization purposes [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
 - Codebase is updated in linting rules at wasm and test stack [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
 - `crossbeam` bumped to `0.8` from `0.7` [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)
 - Un-used/Unstable parts of mm2 excluded from build outputs which avoids mm2 runtime from potential UB [#1699](https://github.com/KomodoPlatform/atomicDEX-API/pull/1699)