diff --git a/egui_demo_app/README.md b/egui_demo_app/README.md
index 472618ec..e33464f2 100644
--- a/egui_demo_app/README.md
+++ b/egui_demo_app/README.md
@@ -9,7 +9,7 @@ Run it locally with `cargo run --release -p egui_demo_app`.
 
 ```sh
 ./sh/start_server.sh &
-./sh/build_demo_web.sh --fast --open
+./sh/build_demo_web.sh --open
 ```
 
 `egui_demo_app` uses [`egui_demo_lib`](https://github.com/emilk/egui/tree/master/egui_demo_lib).
diff --git a/sh/build_demo_web.sh b/sh/build_demo_web.sh
index 2a1068ab..f111085d 100755
--- a/sh/build_demo_web.sh
+++ b/sh/build_demo_web.sh
@@ -3,29 +3,29 @@ set -eu
 script_path=$( cd "$(dirname "${BASH_SOURCE[0]}")" ; pwd -P )
 cd "$script_path/.."
 
-./sh/setup_web.sh
-
 CRATE_NAME="egui_demo_app"
  # NOTE: persistence use up about 400kB (10%) of the WASM!
 FEATURES="glow,http,persistence,screen_reader"
 
 OPEN=false
-FAST=false
+OPTIMIZE=false
 
 while test $# -gt 0; do
   case "$1" in
     -h|--help)
-      echo "build_demo_web.sh [--fast] [--open]"
-      echo "  --fast: skip optimization step"
-      echo "  --open: open the result in a browser"
+      echo "build_demo_web.sh [--optimize] [--open]"
+      echo ""
+      echo "  --optimize: Enable optimization step"
+      echo "              Runs wasm-opt."
+      echo "              NOTE: --optimize also removes debug symbols which are otherwise useful for in-browser profiling."
+      echo ""
+      echo "  --open:     Open the result in a browser"
       exit 0
       ;;
 
-    # Skip running `wasm-opt`.
-    # --fast also preserves debug symbols, which is great for profiling.
-    --fast)
+    -O|--optimize)
       shift
-      FAST=true
+      OPTIMIZE=true
       ;;
 
     --open)
@@ -39,6 +39,8 @@ while test $# -gt 0; do
   esac
 done
 
+./sh/setup_web.sh
+
 # This is required to enable the web_sys clipboard API which eframe web uses
 # https://rustwasm.github.io/wasm-bindgen/api/web_sys/struct.Clipboard.html
 # https://rustwasm.github.io/docs/wasm-bindgen/web-sys/unstable-apis.html
@@ -74,7 +76,7 @@ wasm-bindgen "${WASM_PATH}" --out-dir docs --no-modules --no-typescript
 # to get wasm-strip:  apt/brew/dnf install wabt
 # wasm-strip docs/${CRATE_NAME}_bg.wasm
 
-if [[ "${FAST}" = false ]]; then
+if [[ "${OPTIMIZE}" = true ]]; then
   echo "Optimizing wasm…"
   # to get wasm-opt:  apt/brew/dnf install binaryen
   wasm-opt "docs/${CRATE_NAME}_bg.wasm" -O2 --fast-math -o "docs/${CRATE_NAME}_bg.wasm" # add -g to get debug symbols
diff --git a/sh/start_server.sh b/sh/start_server.sh
index 958654e1..3382c1b8 100755
--- a/sh/start_server.sh
+++ b/sh/start_server.sh
@@ -6,11 +6,13 @@ cd "$script_path/.."
 # Starts a local web-server that serves the contents of the `doc/` folder,
 # i.e. the web-version of `egui_demo_app`.
 
+PORT=8888
+
 echo "ensuring basic-http-server is installed…"
 cargo install basic-http-server
 
 echo "starting server…"
-echo "serving at http://localhost:8888"
+echo "serving at http://localhost:${PORT}"
 
-(cd docs && basic-http-server --addr 127.0.0.1:8888 .)
-# (cd docs && python3 -m http.server 8888 --bind 127.0.0.1)
+(cd docs && basic-http-server --addr 127.0.0.1:${PORT} .)
+# (cd docs && python3 -m http.server ${PORT} --bind 127.0.0.1)