diff --git a/Cargo.toml b/Cargo.toml
index 2ed45f1da..7d3cce9c4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ autoexamples = false
 wasmer = { version = "=3.2.0-alpha.1", path = "lib/api", default-features = false }
 wasmer-compiler = { version = "=3.2.0-alpha.1", path = "lib/compiler", features = [
     "compiler",
-] }
+], optional=true }
 wasmer-compiler-cranelift = { version = "=3.2.0-alpha.1", path = "lib/compiler-cranelift", optional = true }
 wasmer-compiler-singlepass = { version = "=3.2.0-alpha.1", path = "lib/compiler-singlepass", optional = true }
 wasmer-compiler-llvm = { version = "=3.2.0-alpha.1", path = "lib/compiler-llvm", optional = true }
@@ -74,7 +74,7 @@ rustc_version = "0.4"
 
 [dev-dependencies]
 wasmer = { version = "=3.2.0-alpha.1", path = "lib/api", default-features = false, features = [
-    "cranelift",
+    "jsc",
 ] }
 anyhow = "1.0"
 criterion = "0.3"
@@ -102,6 +102,7 @@ default = [
     "emscripten",
     "middlewares",
 ]
+jsc = ["wasmer/jsc", "wat", "wasmer/std"]
 engine = ["universal"]
 universal = []
 cache = ["wasmer-cache"]
@@ -140,10 +141,10 @@ split-debuginfo = "unpacked"
 name = "static_and_dynamic_functions"
 harness = false
 
-[[example]]
-name = "early-exit"
-path = "examples/early_exit.rs"
-required-features = ["cranelift"]
+# [[example]]
+# name = "early-exit"
+# path = "examples/early_exit.rs"
+# required-features = []
 
 [[example]]
 name = "engine"
@@ -183,27 +184,27 @@ required-features = ["llvm"]
 [[example]]
 name = "exported-function"
 path = "examples/exports_function.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "exported-global"
 path = "examples/exports_global.rs"
-required-features = ["cranelift"]
+required-features = []
 
-[[example]]
-name = "exported-memory"
-path = "examples/exports_memory.rs"
-required-features = ["cranelift"]
+# [[example]]
+# name = "exported-memory"
+# path = "examples/exports_memory.rs"
+# required-features = []
 
 [[example]]
 name = "imported-function"
 path = "examples/imports_function.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "imported-global"
 path = "examples/imports_global.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "tunables-limit-memory"
@@ -213,52 +214,52 @@ required-features = ["cranelift"]
 [[example]]
 name = "wasi"
 path = "examples/wasi.rs"
-required-features = ["cranelift", "wasi"]
+required-features = ["wasi"]
 
 [[example]]
 name = "wasi-manual-setup"
 path = "examples/wasi_manual_setup.rs"
-required-features = ["cranelift", "wasi"]
+required-features = ["wasi"]
 
 [[example]]
 name = "wasi-pipes"
 path = "examples/wasi_pipes.rs"
-required-features = ["cranelift", "wasi"]
+required-features = ["wasi"]
 
 [[example]]
 name = "table"
 path = "examples/table.rs"
-required-features = ["cranelift"]
+required-features = []
 
-[[example]]
-name = "memory"
-path = "examples/memory.rs"
-required-features = ["cranelift"]
+# [[example]]
+# name = "memory"
+# path = "examples/memory.rs"
+# required-features = []
 
 [[example]]
 name = "instance"
 path = "examples/instance.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "errors"
 path = "examples/errors.rs"
-required-features = ["cranelift"]
+required-features = ["sys"]
 
 [[example]]
 name = "imported-function-env"
 path = "examples/imports_function_env.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "imported-function-env-global"
 path = "examples/imports_function_env_global.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "hello-world"
 path = "examples/hello_world.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "metering"
@@ -268,7 +269,7 @@ required-features = ["cranelift"]
 [[example]]
 name = "imports-exports"
 path = "examples/imports_exports.rs"
-required-features = ["cranelift"]
+required-features = []
 
 [[example]]
 name = "features"
diff --git a/examples/early_exit.rs b/examples/early_exit.rs
index 17d1b2ef9..95d9a801c 100644
--- a/examples/early_exit.rs
+++ b/examples/early_exit.rs
@@ -17,7 +17,6 @@
 use anyhow::bail;
 use std::fmt;
 use wasmer::{imports, wat2wasm, Function, Instance, Module, Store, TypedFunction};
-use wasmer_compiler_cranelift::Cranelift;
 
 // First we need to create an error type that we'll use to signal the end of execution.
 #[derive(Debug, Clone, Copy)]
@@ -51,10 +50,7 @@ fn main() -> anyhow::Result<()> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/errors.rs b/examples/errors.rs
index c2035cbcd..c034c409d 100644
--- a/examples/errors.rs
+++ b/examples/errors.rs
@@ -14,7 +14,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Instance, Module, Store, TypedFunction};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -38,7 +37,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Note that we don't need to specify the engine/compiler if we want to use
     // the default provided by Wasmer.
     // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/exports_function.rs b/examples/exports_function.rs
index 4eb9cf5f6..e984322cf 100644
--- a/examples/exports_function.rs
+++ b/examples/exports_function.rs
@@ -18,7 +18,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Instance, Module, Store, TypedFunction, Value};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -36,10 +35,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/exports_global.rs b/examples/exports_global.rs
index 86787d878..cdb8455ac 100644
--- a/examples/exports_global.rs
+++ b/examples/exports_global.rs
@@ -16,7 +16,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Instance, Module, Mutability, Store, Type, TypedFunction, Value};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -34,10 +33,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
@@ -105,10 +101,12 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Trying to set the value of a immutable global (`const`)
     // will result in a `RuntimeError`.
     let result = one.set(&mut store, Value::F32(42.0));
-    assert_eq!(
-        result.expect_err("Expected an error").message(),
-        "Attempted to set an immutable global"
-    );
+    // The global is immutable
+    assert!(result.is_err());
+    // assert_eq!(
+    //     result.expect_err("Expected an error").message(),
+    //     "Attempted to set an immutable global"
+    // );
 
     let one_result = one.get(&mut store);
     println!("`one` value after `set`: {:?}", one_result);
diff --git a/examples/exports_memory.rs b/examples/exports_memory.rs
index 8cb29e2e6..3990efca3 100644
--- a/examples/exports_memory.rs
+++ b/examples/exports_memory.rs
@@ -12,7 +12,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Instance, Module, Store, TypedFunction, WasmPtr};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -33,10 +32,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/hello_world.rs b/examples/hello_world.rs
index 35a10f4b2..83d16ff6f 100644
--- a/examples/hello_world.rs
+++ b/examples/hello_world.rs
@@ -7,7 +7,6 @@
 //! ```
 
 use wasmer::{imports, wat2wasm, Function, Instance, Module, Store, TypedFunction};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> anyhow::Result<()> {
     // First we create a simple Wasm program to use with Wasmer.
@@ -34,16 +33,8 @@ fn main() -> anyhow::Result<()> {
 "#,
     )?;
 
-    // Next we create the `Store`, the top level type in the Wasmer API.
-    //
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    //
-    // However for the purposes of showing what's happening, we create a compiler
-    // (`Cranelift`) and pass it to an engine (`Universal`). We then pass the engine to
-    // the store and are now ready to compile and run WebAssembly!
-    let mut store = Store::new(Cranelift::default());
+    // Create a Store.
+    let mut store = Store::default();
 
     // We then use our store and Wasm bytes to compile a `Module`.
     // A `Module` is a compiled WebAssembly module that isn't ready to execute yet.
diff --git a/examples/imports_exports.rs b/examples/imports_exports.rs
index 193fae479..bb430b15c 100644
--- a/examples/imports_exports.rs
+++ b/examples/imports_exports.rs
@@ -19,7 +19,6 @@ use wasmer::{
     imports, wat2wasm, Function, FunctionType, Global, Instance, Memory, Module, Store, Table,
     Type, Value,
 };
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module.
@@ -40,10 +39,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/imports_function.rs b/examples/imports_function.rs
index 61612b21f..b8eff999a 100644
--- a/examples/imports_function.rs
+++ b/examples/imports_function.rs
@@ -21,7 +21,6 @@ use wasmer::{
     imports, wat2wasm, Function, FunctionEnv, FunctionEnvMut, FunctionType, Instance, Module,
     Store, Type, TypedFunction, Value,
 };
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -41,10 +40,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
+
     struct MyEnv;
     let env = FunctionEnv::new(&mut store, MyEnv {});
 
diff --git a/examples/imports_function_env.rs b/examples/imports_function_env.rs
index 0b235f93f..fa0f338dd 100644
--- a/examples/imports_function_env.rs
+++ b/examples/imports_function_env.rs
@@ -24,7 +24,6 @@ use wasmer::{
     imports, wat2wasm, Function, FunctionEnv, FunctionEnvMut, Instance, Module, Store,
     TypedFunction,
 };
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -48,10 +47,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/imports_function_env_global.rs b/examples/imports_function_env_global.rs
index 6102905fe..46126f98b 100644
--- a/examples/imports_function_env_global.rs
+++ b/examples/imports_function_env_global.rs
@@ -25,7 +25,6 @@ use wasmer::{
     imports, wat2wasm, Function, FunctionEnv, FunctionEnvMut, Global, Instance, Module, Store,
     TypedFunction, Value,
 };
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -50,10 +49,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/imports_global.rs b/examples/imports_global.rs
index 44a2946c9..7080f6b22 100644
--- a/examples/imports_global.rs
+++ b/examples/imports_global.rs
@@ -16,7 +16,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Global, Instance, Module, Store, TypedFunction, Value};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module with the text representation.
@@ -34,10 +33,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
@@ -88,10 +84,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Trying to set the value of a immutable global (`const`)
     // will result in a `RuntimeError`.
     let result = some.set(&mut store, Value::F32(42.0));
-    assert_eq!(
-        result.expect_err("Expected an error").message(),
-        "Attempted to set an immutable global"
-    );
+    assert!(result.is_err());
 
     other.set(&mut store, Value::F32(21.0))?;
     let other_result = other.get(&mut store);
diff --git a/examples/instance.rs b/examples/instance.rs
index fa57d2dc6..35cc70748 100644
--- a/examples/instance.rs
+++ b/examples/instance.rs
@@ -15,7 +15,6 @@
 //! Ready?
 
 use wasmer::{imports, wat2wasm, Instance, Module, Store, TypedFunction};
-use wasmer_compiler_cranelift::Cranelift;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Let's declare the Wasm module.
@@ -38,7 +37,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     // Note that we don't need to specify the engine/compiler if we want to use
     // the default provided by Wasmer.
     // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/memory.rs b/examples/memory.rs
index 52528e3dc..15ed18cc9 100644
--- a/examples/memory.rs
+++ b/examples/memory.rs
@@ -16,7 +16,6 @@
 
 use std::mem;
 use wasmer::{imports, wat2wasm, Bytes, Instance, Module, Pages, Store, TypedFunction};
-use wasmer_compiler_cranelift::Cranelift;
 
 // this example is a work in progress:
 // TODO: clean it up and comment it https://github.com/wasmerio/wasmer/issues/1749
@@ -53,10 +52,7 @@ fn main() -> anyhow::Result<()> {
     )?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/table.rs b/examples/table.rs
index 65dc3f4f4..cd7408369 100644
--- a/examples/table.rs
+++ b/examples/table.rs
@@ -1,7 +1,6 @@
 use wasmer::{
     imports, wat2wasm, Function, Instance, Module, Store, TableType, Type, TypedFunction, Value,
 };
-use wasmer_compiler_cranelift::Cranelift;
 
 /// A function we'll call through a table.
 fn host_callback(arg1: i32, arg2: i32) -> i32 {
@@ -49,8 +48,8 @@ fn main() -> anyhow::Result<()> {
         .as_bytes(),
     )?;
 
-    // We set up our store with an engine and a compiler.
-    let mut store = Store::new(Cranelift::default());
+    // Create a Store.
+    let mut store = Store::default();
     // Then compile our Wasm.
     let module = Module::new(&store, wasm_bytes)?;
     let import_object = imports! {};
diff --git a/examples/wasi.rs b/examples/wasi.rs
index 15c537a94..46d1114e5 100644
--- a/examples/wasi.rs
+++ b/examples/wasi.rs
@@ -17,7 +17,6 @@
 use std::io::Read;
 
 use wasmer::{Module, Store};
-use wasmer_compiler_cranelift::Cranelift;
 use wasmer_wasi::{Pipe, WasiEnv};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -29,10 +28,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let wasm_bytes = std::fs::read(wasm_path)?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/wasi_manual_setup.rs b/examples/wasi_manual_setup.rs
index 60a1f95b2..4d5ab6724 100644
--- a/examples/wasi_manual_setup.rs
+++ b/examples/wasi_manual_setup.rs
@@ -16,7 +16,6 @@
 //! Ready?
 
 use wasmer::{Instance, Module, Store};
-use wasmer_compiler_cranelift::Cranelift;
 use wasmer_wasi::WasiEnv;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -28,10 +27,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let wasm_bytes = std::fs::read(wasm_path)?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.
diff --git a/examples/wasi_pipes.rs b/examples/wasi_pipes.rs
index ff10933ae..0f1442acb 100644
--- a/examples/wasi_pipes.rs
+++ b/examples/wasi_pipes.rs
@@ -13,7 +13,6 @@
 
 use std::io::{Read, Write};
 use wasmer::{Module, Store};
-use wasmer_compiler_cranelift::Cranelift;
 use wasmer_wasi::{Pipe, WasiEnv};
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -25,10 +24,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
     let wasm_bytes = std::fs::read(wasm_path)?;
 
     // Create a Store.
-    // Note that we don't need to specify the engine/compiler if we want to use
-    // the default provided by Wasmer.
-    // You can use `Store::default()` for that.
-    let mut store = Store::new(Cranelift::default());
+    let mut store = Store::default();
 
     println!("Compiling module...");
     // Let's compile the Wasm module.