SQLite WebAssembly micro-benchmark and new build with a memory leak fix (#70)

lib/sql-js/benchmark/make.sh

@@ -0,0 +1,21 @@
+#!/bin/bash -e
+
+if [ ! -f sample.csv ]; then
+  wget --header="accept-encoding: gzip" -q -O- \
+    https://github.com/plotly/datasets/raw/547090bd/wellspublic.csv \
+    | gunzip -c > sample.csv
+fi
+
+for d in lib/build-* ; do
+  rm -r lib/dist || true
+  cp -r $d lib/dist
+
+  name=$(basename $d)
+  docker build -t sqliteviz/sqljs-benchmark:$name .
+  docker rm sqljs-benchmark-$name 2> /dev/null || true
+  docker run -it --name sqljs-benchmark-$name sqliteviz/sqljs-benchmark:$name
+  docker cp sqljs-benchmark-$name:/tmp/build/suite-result.json ${name}-result.json
+  docker rm sqljs-benchmark-$name
+done
+
+rm -r lib/dist