feat: using p3-maybe-rayon for multilinear_extensions crate

Author: Sahilgill24

Cargo.lock

@@ -14,6 +14,7 @@ either.workspace = true
 ff_ext.workspace = true
 itertools.workspace = true
 p3.workspace = true
+p3-maybe-rayon.workspace = true
 rand.workspace = true
 rayon.workspace = true
 serde.workspace = true
@@ -26,9 +27,8 @@ log = "0.4"
 serde_json.workspace = true
 
 [features]
-default = ["parallel"]
 nightly-features = ["p3/nightly-features", "ff_ext/nightly-features"]
-parallel = []
+parallel = ["p3-maybe-rayon/parallel"]
 
 [[bench]]
 harness = false

crates/multilinear_extensions/Cargo.toml

@@ -9,8 +9,7 @@ use crate::{
 };
 use ff_ext::{ExtensionField, SmallField};
 use itertools::{Either, Itertools, chain, izip};
-use p3::field::FieldAlgebra;
-use rayon::iter::{IntoParallelIterator, IntoParallelRefIterator, ParallelIterator};
+use p3::{field::FieldAlgebra, maybe_rayon::prelude::*};
 use serde::de::DeserializeOwned;
 use std::{
     cmp::max,

crates/multilinear_extensions/src/expression.rs

@@ -9,15 +9,11 @@ use crate::{
 };
 use either::Either;
 use ff_ext::{ExtensionField, FromUniformBytes};
-use p3::field::{Field, FieldAlgebra};
-use rand::Rng;
-use rayon::{
-    iter::{
-        IndexedParallelIterator, IntoParallelIterator, IntoParallelRefIterator,
-        IntoParallelRefMutIterator, ParallelIterator,
-    },
-    slice::ParallelSliceMut,
+use p3::{
+    field::{Field, FieldAlgebra},
+    maybe_rayon::prelude::*,
 };
+use rand::Rng;
 use serde::{Deserialize, Serialize, de::DeserializeOwned};
 use std::fmt::Debug;
 

crates/multilinear_extensions/src/mle.rs

@@ -10,12 +10,8 @@ use crate::{
 use either::Either;
 use ff_ext::ExtensionField;
 use itertools::Itertools;
-use p3::field::Field;
+use p3::{field::Field, maybe_rayon::prelude::*};
 use rand::Rng;
-use rayon::{
-    iter::{IndexedParallelIterator, IntoParallelIterator, ParallelIterator},
-    slice::ParallelSliceMut,
-};
 use serde::{Deserialize, Serialize, de::DeserializeOwned};
 
 pub type MonomialTermsType<'a, E> =