feat(tvix): Jemalloc -> MiMalloc

Use the faster and newer MiMalloc memory allocator for all endpoints in
the workspace.

Change-Id: Ic60237284ed168e46ec6e8f28e2710bae4385c6f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12149
Tested-by: BuildkiteCI
Reviewed-by: aspen <root@gws.fyi>

tvix/cli/Cargo.toml

@@ -27,6 +27,7 @@ tokio = "1.28.0"
 tracing = "0.1.40"
 tracing-indicatif = "0.3.6"
 rustc-hash = "2.0.0"
+mimalloc = "0.1.43"
 
 [dependencies.wu-manber]
 git = "https://github.com/tvlfyi/wu-manber.git"
@@ -34,9 +35,6 @@ git = "https://github.com/tvlfyi/wu-manber.git"
 [dev-dependencies]
 expect-test = "1.5.0"
 
-[target.'cfg(not(target_env = "msvc"))'.dependencies]
-tikv-jemallocator = "0.5"
-
 [features]
 default = []
 tracy = ["tvix-tracing/tracy"]

tvix/cli/src/main.rs

@@ -1,4 +1,5 @@
 use clap::Parser;
+use mimalloc::MiMalloc;
 use std::rc::Rc;
 use std::{fs, path::PathBuf};
 use tvix_cli::args::Args;
@@ -7,12 +8,8 @@ use tvix_cli::{init_io_handle, interpret, AllowIncomplete};
 use tvix_eval::observer::DisassemblingObserver;
 use tvix_glue::tvix_store_io::TvixStoreIO;
 
-#[cfg(not(target_env = "msvc"))]
-use tikv_jemallocator::Jemalloc;
-
-#[cfg(not(target_env = "msvc"))]
 #[global_allocator]
-static GLOBAL: Jemalloc = Jemalloc;
+static GLOBAL: MiMalloc = MiMalloc;
 
 /// Interpret the given code snippet, but only run the Tvix compiler
 /// on it and return errors and warnings.