build: Speed up playground build

As discussed in PRQL#1836 (comment)

Taskfile.yml

@@ -244,7 +244,10 @@ tasks:
       - mkdir -p website/public
       # Copy the book into the website path, using rsync so it only copies new files
       - rsync -ai --checksum --delete book/book/ website/public/book/
-      - task: install-playground-npm-dependencies
+      # Must set `install-links=false` in the playground's `npm install` to
+      # install prql-js as the regular dependency, instead of creating a
+      # symlink. Refer to https://github.com/PRQL/prql/pull/1296.
+      - cd playground && npm install --install-links=false
       - cd playground && npm run build
       # We place the playground app in a nested path, because we want to use
       # prql-lang.org/playground with an iframe containing the playground.
@@ -290,16 +293,23 @@ tasks:
     cmds:
       - mdbook serve --port=3000
 
+  # Use `npm install --install-links=false` to install prql-js
+  # as the regular dependency, instead of creating a
+  # symlink. Refer to https://github.com/PRQL/prql/pull/1296.
   run-playground:
     desc: Build & serve the playground.
     dir: web/playground
+    env:
+      PROFILE: dev
     cmds:
       - npm install --install-links=false
       - npm start
 
   run-playground-cached:
     desc: Build & serve the playground, without rebuilding rust code.
     dir: web/playground
+    env:
+      PROFILE: dev
     cmds:
       - task: install-playground-npm-dependencies
       - npm start
@@ -309,11 +319,10 @@ tasks:
     # Use task's sources/generates to see if checksums of
     # node_modules directory have changed since package.json was updated
 
-    # Use `npm install --install-links=false` to install prql-js
-    # as the regular dependency, instead of creating a
-    # symlink. Refer to https://github.com/PRQL/prql/pull/1296.
     desc: Check to see if package.json has changed since we ran npm install
     dir: web/playground
+    env:
+      PROFILE: dev
     cmds:
       - npm install --install-links=false
     sources:

bindings/prql-js/README.md

@@ -8,6 +8,14 @@ JavaScript bindings for [`prql-compiler`](https://github.com/PRQL/prql/).
 npm install prql-js
 ```
 
+Pass `--profile=dev` for a faster, less optimized build. Without this, the
+`wasm` binaries are optimized on each run, even if the underlying code hasn't
+changed.
+
+```sh
+npm install prql-js --profile=dev
+```
+
 ## Usage
 
 Currently these functions are exposed

bindings/prql-js/package.json

@@ -17,10 +17,10 @@
     "url": "https://github.com/PRQL/prql"
   },
   "scripts": {
-    "build": "npm run build:node && npm run build:bundler && npm run build:web",
-    "build:bundler": "wasm-pack build --target bundler --release --out-dir dist/bundler && rm dist/bundler/.gitignore",
-    "build:node": "wasm-pack build --target nodejs --release --out-dir dist/node && rm dist/node/.gitignore",
-    "build:web": "wasm-pack build --target no-modules --release --out-dir dist/web && rm dist/web/.gitignore",
+    "build": "npm run build:node && npm run build:web && npm run build:bundler",
+    "build:bundler": "npx cross-env wasm-pack build --target bundler --out-dir dist/bundler --${PROFILE} && rm dist/bundler/.gitignore",
+    "build:node": "npx cross-env wasm-pack build --target nodejs --out-dir dist/node --${PROFILE} && rm dist/node/.gitignore",
+    "build:web": "npx cross-env wasm-pack build --target no-modules --out-dir dist/web --${PROFILE} && rm dist/web/.gitignore",
     "prepare": "npm run build",
     "test": "mocha tests"
   },

bindings/prql-js/src/lib.rs

@@ -1,5 +1,3 @@
-// https://github.com/rustwasm/wasm-bindgen/pull/2984
-#![allow(clippy::drop_non_drop)]
 mod utils;
 
 use std::str::FromStr;

web/playground/README.md

@@ -4,7 +4,7 @@ A fast-feedback compiler from PRQL to SQL, hosted at
 <https://prql-lang.org/playground/>
 
 To run locally,
-[set up a development environment](https://prql-lang.org/book/contributing/development.html),
+[set up a development environment](https://prql-lang.org/book/contributing/development.html#setting-up-a-full-dev-environment),
 and then run[^1]:
 
 ```sh
@@ -15,7 +15,7 @@ task run-playground
 
     ```sh
     cd playground
-    npm install
+    npm install --install-links=false --profile=dev
     npm start
     ```
 

web/playground/package.json

@@ -39,12 +39,10 @@
   "name": "prql-playground",
   "private": true,
   "scripts": {
-    "build": "npm run genBook && react-scripts build",
-    "eject": "npm run genBook && react-scripts eject",
-    "preinstall": "rsync -ai --checksum --delete ../../prql-compiler/tests/integration/data/ public/data/",
-    "start": "npm run genBook && react-scripts start",
-    "test": "npm run genBook && react-scripts test",
-    "genBook": "node generateBook.js"
+    "build": "react-scripts build",
+    "prepare": "rsync -ai --checksum --delete ../../prql-compiler/tests/integration/data/ public/data/ && node generateBook.js",
+    "start": "react-scripts start",
+    "test": "react-scripts test"
   },
   "version": "0.8.1"
 }