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single threaded file loading with env var

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Anton-4 2021-09-27 15:16:07 +02:00
parent f7c1a6e952
commit e0bd644c79
2 changed files with 8 additions and 2 deletions
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9
compiler/load/src/file.rs
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@ -37,13 +37,13 @@ use roc_types::subs::{Subs, VarStore, Variable};
use roc_types::types::{Alias, Type};
use std::collections::hash_map::Entry::{Occupied, Vacant};
use std::collections::{HashMap, HashSet};
use std::fs;
use std::io;
use std::iter;
use std::path::{Path, PathBuf};
use std::str::from_utf8_unchecked;
use std::sync::Arc;
use std::time::{Duration, SystemTime};
use std::{env, fs};
/// Default name for the binary generated for an app, if an invalid one was specified.
const DEFAULT_APP_OUTPUT_PATH: &str = "app";
@ -1351,7 +1351,12 @@ where
// doing .max(1) on the entire expression guards against
// num_cpus returning 0, while also avoiding wrapping
// unsigned subtraction overflow.
let num_workers = num_cpus::get().max(2) - 1;
let default_num_workers = num_cpus::get().max(2) - 1;
let num_workers = match env::var("ROC_NUM_WORKERS") {
Ok(env_str) => env_str.parse::<usize>().unwrap_or(default_num_workers),
Err(_) => default_num_workers,
};
let worker_arenas = arena.alloc(bumpalo::collections::Vec::with_capacity_in(
num_workers,