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Reduce time required to build from scratch in dev mode

* Disable wasm reading of object
* Use tempfile bundled with rustc
* Don't optimize and don't generate debuginfo for build scripts and some
  build deps

Before: 354s (5m 45s)
After: 207s (3m 27s)
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bjorn3 committed Sep 21, 2019
1 parent f2c574a commit 3a7aa6c0fafa5d0b4954b2b48897db73860da166
Showing with 30 additions and 120 deletions.
  1. +0 −117 Cargo.lock
  2. +29 −3 Cargo.toml
  3. +1 −0 src/lib.rs

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@@ -22,12 +22,15 @@ ar = "0.8.0"
bitflags = "1.1.0"
byteorder = "1.2.7"
libc = "0.2.53"
tempfile = "3.0.7"
gimli = { git = "https://github.com/gimli-rs/gimli.git" }
indexmap = "1.0.2"
object = "0.14.0"
libloading = "0.5.1"

[dependencies.object]
version = "0.14.0"
default-features = false
features = ["compression", "read", "std"] # We don't need WASM support

# Uncomment to use local checkout of cranelift
#[patch."https://github.com/CraneStation/cranelift.git"]
#cranelift = { path = "../cranelift/cranelift-umbrella" }
@@ -41,5 +44,28 @@ libloading = "0.5.1"
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
cranelift-simplejit = { git = "https://github.com/CraneStation/cranelift.git" }

[profile.dev.overrides."*"]
[profile.dev]
# By compiling dependencies with optimizations, performing tests gets much faster.
opt-level = 3

[profile.dev.overrides."rustc_codegen_cranelift"]
# Disabling optimizations for cg_clif itself makes compilation after a change faster.
opt-level = 0

# Disable optimizations and debuginfo of build scripts and some of the heavy build deps, as the
# execution time of build scripts is so fast that optimizing them slows down the total build time.
[profile.dev.build-override]
opt-level = 0
debug = false

[profile.dev.overrides.cranelift-codegen-meta]
opt-level = 0
debug = false

[profile.dev.overrides.syn]
opt-level = 0
debug = false

[profile.dev.overrides.synstructure]
opt-level = 0
debug = false
@@ -2,6 +2,7 @@
#![allow(intra_doc_link_resolution_failure)]

extern crate flate2;
extern crate tempfile;
extern crate rustc;
extern crate rustc_codegen_ssa;
extern crate rustc_codegen_utils;

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