fix inconsistent json outputs from rustdoc

Signed-off-by: ozkanonur <work@onurozkan.dev>

2 files changed, 9 insertions, 9 deletions

diff --git a/src/rustdoc-json-types/Cargo.toml b/src/rustdoc-json-types/Cargo.toml
index d60699efd36..d63caa7ad70 100644
--- a/src/rustdoc-json-types/Cargo.toml
+++ b/src/rustdoc-json-types/Cargo.toml
@@ -8,6 +8,7 @@ path = "lib.rs"
 
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
+rustc-hash = "1.1.0"
 
 [dev-dependencies]
 serde_json = "1.0"
diff --git a/src/rustdoc-json-types/lib.rs b/src/rustdoc-json-types/lib.rs
index 387d5787dfc..4c210291b11 100644
--- a/src/rustdoc-json-types/lib.rs
+++ b/src/rustdoc-json-types/lib.rs
@@ -3,10 +3,9 @@
 //! These types are the public API exposed through the `--output-format json` flag. The [`Crate`]
 //! struct is the root of the JSON blob and all other items are contained within.
 
-use std::collections::HashMap;
-use std::path::PathBuf;
-
+use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
 
 /// rustdoc format-version.
 pub const FORMAT_VERSION: u32 = 24;
@@ -24,11 +23,11 @@ pub struct Crate {
     pub includes_private: bool,
     /// A collection of all items in the local crate as well as some external traits and their
     /// items that are referenced locally.
-    pub index: HashMap<Id, Item>,
+    pub index: FxHashMap<Id, Item>,
     /// Maps IDs to fully qualified paths and other info helpful for generating links.
-    pub paths: HashMap<Id, ItemSummary>,
+    pub paths: FxHashMap<Id, ItemSummary>,
     /// Maps `crate_id` of items to a crate name and html_root_url if it exists.
-    pub external_crates: HashMap<u32, ExternalCrate>,
+    pub external_crates: FxHashMap<u32, ExternalCrate>,
     /// A single version number to be used in the future when making backwards incompatible changes
     /// to the JSON output.
     pub format_version: u32,
@@ -54,8 +53,8 @@ pub struct ItemSummary {
     ///
     /// Note that items can appear in multiple paths, and the one chosen is implementation
     /// defined. Currently, this is the full path to where the item was defined. Eg
-    /// [`String`] is currently `["alloc", "string", "String"]` and [`HashMap`] is
-    /// `["std", "collections", "hash", "map", "HashMap"]`, but this is subject to change.
+    /// [`String`] is currently `["alloc", "string", "String"]` and [`HashMap`][`std::collections::HashMap`]
+    /// is `["std", "collections", "hash", "map", "HashMap"]`, but this is subject to change.
     pub path: Vec<String>,
     /// Whether this item is a struct, trait, macro, etc.
     pub kind: ItemKind,
@@ -80,7 +79,7 @@ pub struct Item {
     /// Some("") if there is some documentation but it is empty (EG `#[doc = ""]`).
     pub docs: Option<String>,
     /// This mapping resolves [intra-doc links](https://github.com/rust-lang/rfcs/blob/master/text/1946-intra-rustdoc-links.md) from the docstring to their IDs
-    pub links: HashMap<String, Id>,
+    pub links: FxHashMap<String, Id>,
     /// Stringified versions of the attributes on this item (e.g. `"#[inline]"`)
     pub attrs: Vec<String>,
     pub deprecation: Option<Deprecation>,