diff --git a/ufovectors/benchmark/create_binary_files.sh b/ufovectors/benchmark/create_binary_files.sh
deleted file mode 100755
index 2473772..0000000
--- a/ufovectors/benchmark/create_binary_files.sh
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/bash
-
-head -c 400000 /dev/urandom > 100Kints.bin
-head -c 2000000 /dev/urandom > 500Kints.bin
-
-head -c 4000000 /dev/urandom > 1Mints.bin
-head -c 64000000 /dev/urandom > 16Mints.bin
-head -c 128000000 /dev/urandom > 32Mints.bin
-head -c 256000000 /dev/urandom > 64Mints.bin
-head -c 512000000 /dev/urandom > 128Mints.bin
-#head -c 1024000000 /dev/urandom > 256Mints.bin
-#head -c 2048000000 /dev/urandom > 512Mints.bin
-head -c 4096000000 /dev/urandom > 1024Mints.bin
\ No newline at end of file
diff --git a/ufovectors/benchmark/matrix.R b/ufovectors/benchmark/matrix.R
deleted file mode 100644
index 4032f6d..0000000
--- a/ufovectors/benchmark/matrix.R
+++ /dev/null
@@ -1,23 +0,0 @@
-#devtools::install_github("olafmersmann/microbenchmarkCore")
-#devtools::install_github("olafmersmann/microbenchmark")
-
-library(microbenchmark)
-library(ggplot2)
-
-library(ufovectors)
-library(ufoaltrep)
-
-setwd("~/Workspace/ufo_workspace/UFOs/ufovectors/benchmark")
-
-result <- microbenchmark(
-  "UFO" = {
-    sum(ufo_integer_bin("32Mints.bin"))
-  },
-  "ALTREP" = {
-    sum(altrep_ufo_integer_bin("32Mints.bin"))
-  },
-  times = 10L
-)
-#ufo_shutdown()
-
-autoplot(result)
\ No newline at end of file
diff --git a/ufovectors/data/gen.c b/ufovectors/data/gen.c
new file mode 100644
index 0000000..78ecc00
--- /dev/null
+++ b/ufovectors/data/gen.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+int main (int argc,char *argv[]) {
+    if (argc != 4) {
+        printf("usage: gen FILE N_ITEMS VALUE");
+        exit(1);
+    }
+
+    char *path = argv[1]; 
+    size_t n = atoi(argv[2]);
+    uint32_t v = atoi(argv[3]);
+
+    FILE *fp = fopen(path, "w");
+    for (size_t i = 0; i < n; i++) {
+        fwrite(&v, sizeof(uint32_t), 1, fp);
+    }    
+    fclose(fp);
+}
diff --git a/ufovectors/data/gen.sh b/ufovectors/data/gen.sh
new file mode 100755
index 0000000..d97b8f6
--- /dev/null
+++ b/ufovectors/data/gen.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+[ ! -e "gen" ] && (gcc -o gen gen.c)
+
+if [ $# -ne 3 ]
+then
+    echo "usage: gen.sh FILE N_ITEMS VALUE"
+    exit 1
+fi
+
+case "$3" in
+    random) head -c $((4 * $2)) /dev/urandom > "$1";;
+    *)      ./gen "$1" "$2" "$3";;
+esac
diff --git a/ufovectors/data/generate_examples.sh b/ufovectors/data/generate_examples.sh
new file mode 100755
index 0000000..08963ba
--- /dev/null
+++ b/ufovectors/data/generate_examples.sh
@@ -0,0 +1,25 @@
+#!/bin/bash
+
+function generate_both {
+    echo "generating ${1}_rand_int.bin" 
+    ./gen "${1}_rand_int.bin" $2 random
+
+    echo "generating ${1}_ones_int.bin" 
+    ./gen "${1}_ones_int.bin" $2 1
+}
+    
+function generate_ones {
+    echo "generating ${1}_ones_int.bin" 
+    ./gen "${1}_ones_int.bin" $2 1
+}
+
+#                   T  G  M  K  1   
+generate_both 1K             1000    # 3.9 KB
+generate_both 100K         100000    # 392 KB 
+generate_both 1M          1000000    # 3.8 MB
+generate_both 10M        10000000    # 38  MB
+generate_both 100M      100000000    # 381 MB
+generate_ones 1G       1000000000    # 3.7 GB
+#                   T  G  M  K  1   
+
+