update #112

examples/README.md

@@ -161,4 +161,26 @@ Execute:
 ```
 examples/cpp/mp_mandelbrot.sh
 ```
-Then you should see a new file under `examples/output`.
+Then you should see a new file under `examples/output`.
+
+### Benchmark: Creating a simple mandelbrot using a custom formula with MPFR
+In this example we use [google microbenchmark support library] to get some feedback about calculations performance with [mpfr library](https://www.mpfr.org/).
+Execute:
+```
+examples/cpp/mp_benchmark.sh
+```
+Check the output, it should be something like:
+```shell
+Run on (4 X 2300 MHz CPU s)
+CPU Caches:
+  L1 Data 32 KiB (x4)
+  L1 Instruction 32 KiB (x4)
+  L2 Unified 256 KiB (x4)
+  L3 Unified 6144 KiB (x4)
+Load Average: 1.02, 0.55, 0.38
+***WARNING*** Library was built as DEBUG. Timings may be affected.
+----------------------------------------------------------------------
+Benchmark                            Time             CPU   Iterations
+----------------------------------------------------------------------
+BM_fractal/min_time:120.000       5414 ms         5396 ms           31
+```

examples/cpp/CMakeLists.txt

@@ -35,7 +35,7 @@ target_link_libraries(example ${CMAKE_DL_LIBS})
 
 add_definitions(-DTHREADS -D_REENTRANT -DPNG_ENABLED -DJPG_ENABLED)
 
-add_subdirectory(benchmark)
+find_package(benchmark REQUIRED)
 target_link_libraries(example benchmark::benchmark)
 
 # FRACT_STDLIB

examples/cpp/Dockerfile

@@ -14,7 +14,7 @@ RUN git clone https://github.com/google/benchmark.git && \
 	git clone https://github.com/google/googletest.git benchmark/googletest && \
 	cd benchmark && \
 	mkdir build && cd build && \
-	cmake ../ && make
+	cmake ../ && make && make install
 
 
 ARG main_source