Added native exampleHEADmaster

4 files changed, 23 insertions, 2 deletions

diff --git a/03_threads/build-native.sh b/03_threads/build-native.sh
new file mode 100755
index 0000000..251e0a0
--- /dev/null
+++ b/03_threads/build-native.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+mkdir -p build
+cc -o build/native primes.c native.c
diff --git a/03_threads/native.c b/03_threads/native.c
new file mode 100644
index 0000000..4a3d4fa
--- /dev/null
+++ b/03_threads/native.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int primes_in_range(int, int);
+
+int main() {
+        int low = 1;
+        int high = 10000000;
+        int result = primes_in_range(low, high);
+        printf("There are %d primes between %d and %d\n", result, low, high);
+}
diff --git a/03_threads/program.mjs b/03_threads/program.mjs
index db0a2c6..3bdb4ea 100644
--- a/03_threads/program.mjs
+++ b/03_threads/program.mjs
@@ -2,5 +2,7 @@ import Primes from "./build/primes.mjs"
 
 var primes = await Primes();
 
-const count = primes._primes_in_range(1, 100);
-console.log("There are " + count + " primes between 1 and 100");
+var low = 1;
+var high = 10000000;
+const count = primes._primes_in_range(low, high);
+console.log("There are " + count + " primes between " + low + " and " + high);
diff --git a/README.md b/README.md
index de7ef81..6bce4cb 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,11 @@ In `03_threads` we build a more complicated example based on
 example, the web server has to be configured to provide the correct
 `Cross-Origin-*` headers, see `03_threads/run-server.sh` for details.
 
+There is also a piece of code meant to run this more complicated library
+function natively (`native.c`). It can be used, for example, to compare
+the performance of native code vs WASM running in Node.js.  You can
+build it with `./build-native.sh` and run it with `./build/native`.
+
 ## 4. Don't block the main thread
 
 In `04_no_block` we avoid our calculations blocking the main browser