diff --git a/.travis.yml b/.travis.yml
index 18ed080f..4c3a8422 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,5 @@
 language: d
-dist: trusty
-sudo: false
+sudo: required
 packages:
   - pkg-config
 d:
@@ -15,28 +14,29 @@ branches:
 env:
  - ARCH="x86_64"
 matrix:
-  # include:
-  #   - {os: linux, d: ldc-beta, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
-  #   - {os: linux, d: ldc, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
-  #   - {os: linux, d: dmd-beta, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
-  #   - {os: linux, d: dmd, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
+  include:
+    - {os: linux, d: ldc-beta, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
+    - {os: linux, d: ldc, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
+    - {os: linux, d: dmd-beta, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
+    - {os: linux, d: dmd, env: ARCH="x86", addons: {apt: {packages: [[gcc-multilib]]}}}
   allow_failures:
     - {d: dmd-nightly}
     - {d: ldc-beta}
     - {d: gdc}
 install:
-  - pyenv global system 3.6
-  - pip3 install 'meson>=0.45'
-  - mkdir .ntmp
-  - curl -L https://github.com/ninja-build/ninja/releases/download/v1.8.2/ninja-linux.zip -o .ntmp/ninja-linux.zip
-  - unzip .ntmp/ninja-linux.zip -d .ntmp
-before_script:
-  - export PATH=$PATH:$PWD/.ntmp
+    - curl -L "https://github.com/ninja-build/ninja/releases/download/v1.7.2/ninja-linux.zip" -o ninja-linux.zip
+    - sudo unzip ninja-linux.zip -d /usr/local/bin
+    - sudo chmod 755 /usr/local/bin/ninja
+    - sudo add-apt-repository -y ppa:deadsnakes/ppa
+    - sudo apt-get -y update
+    - sudo apt-get -y install python3.6
+    - curl https://bootstrap.pypa.io/get-pip.py | sudo python3.6
+    - sudo pip3 install meson
 script:
 #  - travis_wait 100 dub test --arch "$ARCH"
+ - travis_wait 100 dub test --arch "$ARCH" --build=unittest-cov
  - ./test_examples.sh
  - meson build && cd build && ninja -j4 && ninja -j4 test -v && cd .. # TODO: 32bit meson test
-#  - travis_wait 100 dub test --arch "$ARCH" --build=unittest-cov
 #  - travis_wait 100 dub test --arch "$ARCH" --build=unittest-release
 
 after_success:
diff --git a/doc/Makefile b/doc/Makefile
index 2726e0d2..08bccc22 100644
--- a/doc/Makefile
+++ b/doc/Makefile
@@ -29,7 +29,7 @@ MIR_PACKAGES = mir mir/ndslice mir/ndslice/connect mir/internal mir/math mir/mat
 
 PACKAGE_mir = bitmanip bitop conv functional primitives range series utility qualifier range
 
-PACKAGE_mir_array = primitives
+PACKAGE_mir_array = allocation primitives
 PACKAGE_mir_combinatorics = package
 PACKAGE_mir_algorithm = iteration setops
 PACKAGE_mir_container = binaryheap
diff --git a/source/mir/algorithm/iteration.d b/source/mir/algorithm/iteration.d
index 102cf5d7..9bf5ca74 100644
--- a/source/mir/algorithm/iteration.d
+++ b/source/mir/algorithm/iteration.d
@@ -12,8 +12,8 @@ $(T2 cmp, Compares two slices.)
 $(T2 count, Counts elements in a slices according to a predicate.)
 $(T2 each, Iterates all elements.)
 $(T2 eachLower, Iterates lower triangle of matrix.)
-$(T2 eachUpper, Iterates upper triangle of matrix.)
 $(T2 eachUploPair, Iterates upper and lower pairs of elements in square matrix.)
+$(T2 eachUpper, Iterates upper triangle of matrix.)
 $(T2 equal, Compares two slices for equality.)
 $(T2 find, Finds backward index.)
 $(T2 findIndex, Finds index.)
@@ -24,6 +24,7 @@ $(T2 minIndex, Finds index of the minimum.)
 $(T2 minmaxIndex, Finds indexes of the minimum and the maximum.)
 $(T2 minmaxPos, Finds backward indexes of the minimum and the maximum.)
 $(T2 minPos, Finds backward index of the minimum.)
+$(T2 nBitsToCount, Сount bits until set bit count is reached.)
 $(T2 reduce, Accumulates all elements.)
 $(T2 uniq, Iterates over the unique elements in a range, which is assumed sorted.)
 )
@@ -498,6 +499,8 @@ const:
 }
 
 /++
+Сount bits until set bit count is reached. Works with ndslices created with $(REF bitwise, mir,ndslice,topology), $(REF bitSlice, mir,ndslice,allocation).
+Returns: bit count if set bit count is reached or `-1` otherwise.
 +/
 sizediff_t nBitsToCount(Field, I)(Slice!(FieldIterator!(BitField!(Field, I))) bitSlice, size_t count)
 {
@@ -1686,6 +1689,8 @@ Params:
 See_also:
     $(LREF find),
     $(LREF any).
+Optimization:
+    `findIndex!"a"` has accelerated specialization for slices created with $(REF bitwise, mir,ndslice,topology), $(REF bitSlice, mir,ndslice,allocation).
 +/
 template findIndex(alias pred)
 {
@@ -1774,6 +1779,9 @@ See_also:
     $(LREF findIndex),
     $(LREF any),
     $(REF Slice.backward, mir,ndslice,slice).
+
+Optimization:
+    `find!"a"` has accelerated specialization for slices created with $(REF bitwise, mir,ndslice,topology), $(REF bitSlice, mir,ndslice,allocation).
 +/
 template find(alias pred)
 {
@@ -1946,6 +1954,8 @@ Like $(LREF find), but only returns whether or not the search was successful.
 
 Params:
     pred = The predicate.
+Optimization:
+    `any!"a"` has accelerated specialization for slices created with $(REF bitwise, mir,ndslice,topology), $(REF bitSlice, mir,ndslice,allocation).
 +/
 template any(alias pred = "a")
 {
@@ -2103,7 +2113,8 @@ Checks if all of the elements verify `pred`.
 
 Params:
     pred = The predicate.
-
+Optimization:
+    `all!"a"` has accelerated specialization for slices created with $(REF bitwise, mir,ndslice,topology), $(REF bitSlice, mir,ndslice,allocation).
 +/
 template all(alias pred = "a")
 {
diff --git a/source/mir/ndslice/field.d b/source/mir/ndslice/field.d
index ce29e524..8506e8bc 100644
--- a/source/mir/ndslice/field.d
+++ b/source/mir/ndslice/field.d
@@ -7,8 +7,8 @@ An ndslice can be created on top of a field using $(SUBREF slice, slicedField).
 
 $(BOOKTABLE $(H2 Fields),
 $(TR $(TH Field Name) $(TH Used By))
-$(T2 BitpackField, $(SUBREF topology, bitpack))
 $(T2 BitField, $(SUBREF topology, bitwise))
+$(T2 BitpackField, $(SUBREF topology, bitpack))
 $(T2 CycleField, $(SUBREF topology, cycle) (2 kinds))
 $(T2 LinspaceField, $(SUBREF topology, linspace))
 $(T2 MagicField, $(SUBREF topology, magic))
diff --git a/source/mir/ndslice/package.d b/source/mir/ndslice/package.d
index 686fd60d..60c06d98 100644
--- a/source/mir/ndslice/package.d
+++ b/source/mir/ndslice/package.d
@@ -127,13 +127,14 @@ $(TR $(TDNW $(SUBMODULE topology) $(BR)
         $(SUBREF topology, assumeContiguous)
         $(SUBREF topology, bitpack)
         $(SUBREF topology, bitwise)
-        $(SUBREF topology, bytegroup)
         $(SUBREF topology, blocks)
         $(SUBREF topology, byDim)
-        $(SUBREF topology, canonical)
-        $(SUBREF topology, cartesian)
+        $(SUBREF topology, bytegroup)
         $(SUBREF topology, cached)
         $(SUBREF topology, cachedGC)
+        $(SUBREF topology, canonical)
+        $(SUBREF topology, cartesian)
+        $(SUBREF topology, cycle)
         $(SUBREF topology, diagonal)
         $(SUBREF topology, diff)
         $(SUBREF topology, evertPack)
@@ -143,11 +144,12 @@ $(TR $(TDNW $(SUBMODULE topology) $(BR)
         $(SUBREF topology, ipack)
         $(SUBREF topology, kronecker)
         $(SUBREF topology, linspace)
+        $(SUBREF topology, magic)
         $(SUBREF topology, map)
         $(SUBREF topology, mapSubSlices)
-        $(SUBREF topology, magic)
         $(SUBREF topology, member)
         $(SUBREF topology, ndiota)
+        $(SUBREF topology, orthogonalReduceField)
         $(SUBREF topology, pack)
         $(SUBREF topology, pairwise)
         $(SUBREF topology, pairwiseMapSubSlices)
@@ -237,12 +239,14 @@ $(TR $(TDNW $(SUBMODULE iterator)
 $(TR $(TDNW $(SUBMODULE field)
         $(BR) $(SMALL Declarations))
      $(TD
-        $(SUBREF field, BitpackField)
         $(SUBREF field, BitField)
+        $(SUBREF field, BitpackField)
+        $(SUBREF field, CycleField)
         $(SUBREF field, LinspaceField)
         $(SUBREF field, MagicField)
         $(SUBREF field, MapField)
         $(SUBREF field, ndIotaField)
+        $(SUBREF field, OrthogonalReduceField)
         $(SUBREF field, RepeatField)
     )
 )
diff --git a/source/mir/ndslice/topology.d b/source/mir/ndslice/topology.d
index c9d89f0b..a806d421 100644
--- a/source/mir/ndslice/topology.d
+++ b/source/mir/ndslice/topology.d
@@ -16,13 +16,16 @@ $(T2 assumeContiguous, Converts a slice to contiguous $(SUBREF slice, SliceKind)
 $(BOOKTABLE $(H2 Sequence Selectors),
 $(TR $(TH Function Name) $(TH Description))
 
-$(T2 repeat, Slice with identical values)
+$(T2 cycle, Cycle repeates 1-dimensional field/range/array/slice in a fixed length 1-dimensional slice)
 $(T2 iota, Contiguous Slice with initial flattened (contiguous) index.)
-$(T2 ndiota, Contiguous Slice with initial multidimensional index.)
 $(T2 linspace, Evenly spaced numbers over a specified interval.)
 $(T2 magic, Magic square.)
+$(T2 ndiota, Contiguous Slice with initial multidimensional index.)
+$(T2 repeat, Slice with identical values)
 )
 
+.
+
 $(BOOKTABLE $(H2 Products),
 $(TR $(TH Function Name) $(TH Description))
 
@@ -1894,7 +1897,7 @@ version(mir_test) unittest
 }
 
 /++
-Cycle creates 1-dimensional slice over the range.
+Cycle repeates 1-dimensional field/range/array/slice in a fixed length 1-dimensional slice.
 +/
 auto cycle(Field)(Field field, size_t loopLength, size_t length)
     if (!isSlice!Field && !is(Field : T[], T))
diff --git a/test_examples.sh b/test_examples.sh
index 089592b4..8ec66b66 100755
--- a/test_examples.sh
+++ b/test_examples.sh
@@ -2,12 +2,10 @@
 
 set -euo pipefail
 
-if [ ! -e test_extractor.d ] ; then
-    wget https://raw.githubusercontent.com/dlang/tools/6b7ef76d679563e6fccef2a6b437008d96459e95/tests_extractor.d
-fi
+dub fetch dtools
 
 # extract examples
-dub ./tests_extractor.d -i source -o out
+dub run dtools:tests_extractor -- -i source -o out
 
 # compile the examples
 for file in $(find out -name "*.d") ; do