[#benchmarks]
:idprefix: benchmarks_
:imagesdir: ../diagrams

= Benchmarks

== boost::unordered_[multi]set

All benchmarks were created using `unordered_set<unsigned int>` (non-duplicate) and `unordered_multiset<unsigned int>` (duplicate). The source code can be https://github.com/boostorg/boost_unordered_benchmarks/tree/boost_unordered_set[found here^].

The insertion benchmarks insert `n` random values, where `n` is between 10,000 and 3 million. For the duplicated benchmarks, the same random values are repeated an average of 5 times.

The erasure benchmarks erase all `n` elements randomly until the container is empty.

The successful lookup benchmarks are done by looking up all `n` values, in their original insertion order.

The unsuccessful lookup benchmarks use `n` randomly generated integers but using a different seed value.

=== GCC 11 + libstdc++-v3, x64

==== Insertion

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/gcc/running insertion.xlsx.practice.png[width=250,link=../diagrams/benchmarks-set/gcc/running insertion.xlsx.practice.png,window=_blank]
|image::benchmarks-set/gcc/running%20insertion.xlsx.practice non-unique.png[width=250,link=../diagrams/benchmarks-set/gcc/running%20insertion.xlsx.practice non-unique.png,window=_blank]
|image::benchmarks-set/gcc/running%20insertion.xlsx.practice non-unique 5.png[width=250,link=../diagrams/benchmarks-set/gcc/running%20insertion.xlsx.practice non-unique 5.png,window=_blank]

h|non-duplicate elements 
h|duplicate elements 
h|duplicate elements +
max load factor 5
|===

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/gcc/running%20insertion.xlsx.practice norehash.png[width=250,link=../diagrams/benchmarks-set/gcc/running%20insertion.xlsx.practice norehash.png,window=_blank]
|image::benchmarks-set/gcc/running%20insertion.xlsx.practice norehash non-unique.png[width=250,link=../diagrams/benchmarks-set/gcc/running%20insertion.xlsx.practice norehash non-unique.png,window=_blank]
|image::benchmarks-set/gcc/running%20insertion.xlsx.practice norehash non-unique 5.png[width=250,link=../diagrams/benchmarks-set/gcc/running%20insertion.xlsx.practice norehash non-unique 5.png,window=_blank]

h|non-duplicate elements, +
prior `reserve`
h|duplicate elements, +
prior `reserve` 
h|duplicate elements, +
max load factor 5, +
prior `reserve`

|===

==== Erasure

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/gcc/scattered%20erasure.xlsx.practice.png[width=250,link=../diagrams/benchmarks-set/gcc/scattered%20erasure.xlsx.practice.png,window=_blank]
|image::benchmarks-set/gcc/scattered%20erasure.xlsx.practice non-unique.png[width=250,link=../diagrams/benchmarks-set/gcc/scattered%20erasure.xlsx.practice non-unique.png,window=_blank]
|image::benchmarks-set/gcc/scattered%20erasure.xlsx.practice non-unique 5.png[width=250,link=../diagrams/benchmarks-set/gcc/scattered%20erasure.xlsx.practice non-unique 5.png,window=_blank]

h|non-duplicate elements 
h|duplicate elements 
h|duplicate elements +
max load factor 5
|===

==== Successful Lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice.png]
|image::benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20successful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

==== Unsuccessful lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice.png]
|image::benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/gcc/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

=== Clang 12 + libc++, x64

==== Insertion

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice.png[width=250, window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice.png]
|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice non-unique.png[width=250, window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice non-unique.png]
|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice non-unique 5.png[width=250, window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash.png]
|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash non-unique.png]
|image::benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/running%20insertion.xlsx.practice norehash non-unique 5.png]

h|non-duplicate elements, +
prior `reserve`
h|duplicate elements, +
prior `reserve`
h|duplicate elements, +
max load factor 5, +
prior `reserve`

|===

==== Erasure

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice.png]
|image::benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice non-unique.png]
|image::benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20erasure.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

==== Successful lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice.png]
|image::benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20successful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

==== Unsuccessful lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice.png]
|image::benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/clang_libcpp/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

=== Visual Studio 2019 + Dinkumware, x64

==== Insertion

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/vs/running%20insertion.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice.png]
|image::benchmarks-set/vs/running%20insertion.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice non-unique.png]
|image::benchmarks-set/vs/running%20insertion.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/vs/running%20insertion.xlsx.practice norehash.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice norehash.png]
|image::benchmarks-set/vs/running%20insertion.xlsx.practice norehash non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice norehash non-unique.png]
|image::benchmarks-set/vs/running%20insertion.xlsx.practice norehash non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/running%20insertion.xlsx.practice norehash non-unique 5.png]

h|non-duplicate elements, +
prior `reserve`
h|duplicate elements, +
prior `reserve`
h|duplicate elements, +
max load factor 5, +
prior `reserve`

|===

==== Erasure

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/vs/scattered%20erasure.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20erasure.xlsx.practice.png]
|image::benchmarks-set/vs/scattered%20erasure.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20erasure.xlsx.practice non-unique.png]
|image::benchmarks-set/vs/scattered%20erasure.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20erasure.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

==== Successful lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice.png]
|image::benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20successful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

==== Unsuccessful lookup

[caption=]
[cols="3*^.^a", frame=all, grid=all]
|===

|image::benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice.png]
|image::benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice non-unique.png]
|image::benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png[width=250,window=_blank,link=../diagrams/benchmarks-set/vs/scattered%20unsuccessful%20looukp.xlsx.practice non-unique 5.png]

h|non-duplicate elements
h|duplicate elements
h|duplicate elements, +
max load factor 5

|===

== boost::unordered_flat_map

All benchmarks were created using:

* `https://abseil.io/docs/cpp/guides/container[absl::flat_hash_map^]<uint64_t, uint64_t>`
* `boost::unordered_flat_map<uint64_t, uint64_t>`
* `boost::unordered_map<uint64_t, uint64_t>`

The source code can be https://github.com/boostorg/boost_unordered_benchmarks/tree/boost_unordered_flat_map[found here^].

The insertion benchmarks insert `n` random values, where `n` is between 10,000 and 10 million.

The erasure benchmarks erase traverse the `n` elements and erase those with odd key (50% on average).

The successful lookup benchmarks are done by looking up all `n` values, in their original insertion order.

The unsuccessful lookup benchmarks use `n` randomly generated integers but using a different seed value.


=== GCC 11, x64


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/gcc-x64/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x64/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x64/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x64/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x64/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x64/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== Clang 12, x64


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/clang-x64/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x64/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x64/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x64/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x64/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x64/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== Visual Studio 2019, x64


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/vs-x64/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x64/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x64/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x64/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x64/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x64/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x64/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== Clang 12, ARM64


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/clang-arm64/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-arm64/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/clang-arm64/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-arm64/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/clang-arm64/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-arm64/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/clang-arm64/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-arm64/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== GCC 11, x86


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/gcc-x86/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x86/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x86/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x86/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x86/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x86/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/gcc-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/gcc-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== Clang 12, x86


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/clang-x86/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x86/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x86/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x86/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x86/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x86/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/clang-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/clang-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

=== Visual Studio 2019, x86


[caption=]
[cols="4*^.^a", frame=all, grid=all]
|===

|image::benchmarks-flat_map/vs-x86/Running%20insertion.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x86/Running%20insertion.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x86/Running%20erasure.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x86/Running%20erasure.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x86/Scattered%20successful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x86/Scattered%20successful%20looukp.xlsx.plot.png]
|image::benchmarks-flat_map/vs-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png[width=250,window=_blank,link=../diagrams/benchmarks-flat_map/vs-x86/Scattered%20unsuccessful%20looukp.xlsx.plot.png]

h|running insertion
h|running erasure
h|successful lookup
h|unsuccessful lookup

|===

