Use default allocator instead of wee_alloc in numbat-wasm

Crate has major unresolved issues such as memory leaks
(https://github.com/rustwasm/wee_alloc/issues/106). Its last commit at
the moment was made shy of 3 years ago, and the latest release is over 4
years old. I see no reason to keep using it in light of this.

numbat-wasm/Cargo.lock

@@ -41,12 +41,6 @@ version = "3.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f30e7476521f6f8af1a1c4c0b8cc94f0bee37d91763d0ca2665f299b6cd8aec"
 
-[[package]]
-name = "cfg-if"
-version = "0.1.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
-
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -69,7 +63,7 @@ version = "0.1.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06aeb73f470f66dcdbf7223caeebb85984942f22f1adb2a088cf9668146bbbc"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "wasm-bindgen",
 ]
 
@@ -145,7 +139,7 @@ version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "libc",
  "wasi",
 ]
@@ -221,12 +215,6 @@ version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
-[[package]]
-name = "memory_units"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8452105ba047068f40ff7093dd1d9da90898e63dd61736462e9cdda6a90ad3c3"
-
 [[package]]
 name = "num-bigint"
 version = "0.4.4"
@@ -319,7 +307,6 @@ dependencies = [
  "termcolor",
  "wasm-bindgen",
  "wasm-bindgen-test",
- "wee_alloc",
 ]
 
 [[package]]
@@ -452,7 +439,7 @@ version = "0.10.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "793db75ad2bcafc3ffa7c68b215fee268f537982cd901d132f89c6343f3a3dc8"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "cpufeatures",
  "digest",
 ]
@@ -570,7 +557,7 @@ version = "0.2.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b1223296a201415c7fad14792dbefaace9bd52b62d33453ade1c5b5f07555406"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "wasm-bindgen-macro",
 ]
 
@@ -595,7 +582,7 @@ version = "0.4.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bde2032aeb86bdfaecc8b261eef3cba735cc426c1f3a3416d1e0791be95fc461"
 dependencies = [
- "cfg-if 1.0.0",
+ "cfg-if",
  "js-sys",
  "wasm-bindgen",
  "web-sys",
@@ -665,18 +652,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "wee_alloc"
-version = "0.4.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dbb3b5a6b2bb17cb6ad44a2e68a43e8d2722c997da10e928665c72ec6c0a0b8e"
-dependencies = [
- "cfg-if 0.1.10",
- "libc",
- "memory_units",
- "winapi",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"

numbat-wasm/Cargo.toml

@@ -19,11 +19,6 @@ wasm-bindgen = "0.2.90"
 # code size when deploying.
 console_error_panic_hook = { version = "0.1.6", optional = true }
 
-# `wee_alloc` is a tiny allocator for wasm that is only ~1K in code size
-# compared to the default allocator's ~10K. It is slower than the default
-# allocator, however.
-wee_alloc = { version = "0.4.5", optional = true }
-
 numbat = { path = "../numbat", default-features = false }
 html-escape = "0.2.13"
 termcolor = "1.4.1"

numbat-wasm/build.sh

@@ -3,4 +3,4 @@
 set -euo pipefail
 
 rm -rf www/pkg
-wasm-pack build --features=wee_alloc --target=web --out-dir=www/pkg
+wasm-pack build --target=web --out-dir=www/pkg

numbat-wasm/src/lib.rs

@@ -19,12 +19,6 @@ use numbat::resolver::CodeSource;
 use numbat::{markup as m, NameResolutionError, NumbatError};
 use numbat::{Context, InterpreterSettings};
 
-// When the `wee_alloc` feature is enabled, use `wee_alloc` as the global
-// allocator.
-#[cfg(feature = "wee_alloc")]
-#[global_allocator]
-static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
-
 #[wasm_bindgen]
 pub fn setup_panic_hook() {
     utils::set_panic_hook();