Add fftw3 to benchmark script

benches/benchmark.sh

@@ -15,11 +15,22 @@ iters=$3
 OUTPUT_DIR=benchmark-data.$(date +"%Y.%m.%d.%H-%M-%S")
 mkdir -p "$OUTPUT_DIR"/fftw3 && mkdir "$OUTPUT_DIR"/rustfft && mkdir "$OUTPUT_DIR"/phastft
 
+benchmark_fftw3() {
+    make clean && make
+
+    for n in $(seq "$start" "$end"); do
+        echo "Running FFTW3 benchmark for N = 2^${n}..." && \
+        for _ in $(seq 1 "$iters"); do
+            ./bench_fftw "${n}" >> "${OUTPUT_DIR}"/fftw3/size_"${n}"
+        done
+    done
+}
+
 benchmark_phastft() {
     cargo clean && cargo build --release --examples
 
     for n in $(seq "$start" "$end"); do
-        echo "running PhastFT benchmark for N = 2^${n}" && \
+        echo "Running PhastFT benchmark for N = 2^${n}..." && \
         for _ in $(seq 1 "$iters"); do
             ../target/release/examples/benchmark "${n}" >> "${OUTPUT_DIR}"/phastft/size_"${n}"
         done
@@ -30,12 +41,13 @@ benchmark_rustfft() {
     cargo clean && cargo build --release --examples
 
     for n in $(seq "$start" "$end"); do
-        echo "running RustFFT benchmark for N = 2^${n}" && \
+        echo "Running RustFFT benchmark for N = 2^${n}..." && \
         for _ in $(seq 1 "$iters"); do
             ../target/release/examples/rustfft "${n}" >> "${OUTPUT_DIR}"/rustfft/size_"${n}"
         done
     done
 }
 
+benchmark_fftw3
+benchmark_phastft
 benchmark_rustfft
-benchmark_phastft

benches/main.c

@@ -24,8 +24,8 @@ int main(int argc, char** argv) {
     fftw_plan p = fftw_plan_dft_1d(N, in, in, FFTW_FORWARD, FFTW_ESTIMATE);
     fftw_execute(p);
     double toc = clock();
-
     double elapsed = ((double)(toc - tic) / CLOCKS_PER_SEC) * 1000000;
+
     printf("%f\n", elapsed);
     fftw_free(in);
     fftw_destroy_plan(p);