dirstate-tree: Add #[timed] attribute to `status` and `DirstateMap::read`

dirstate-tree: Add #[timed] attribute to `status` and `DirstateMap::read`

When running with a `RUST_LOG=trace` environment variable, the `micro_timer`
crate prints the duration taken by each call to functions with that attribute.

Differential Revision: https://phab.mercurial-scm.org/D10552

--- a/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Tue Apr 27 14:20:48 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/dirstate_map.rs	Tue Apr 27 17:49:38 2021 +0200
@@ -1,4 +1,5 @@
 use bytes_cast::BytesCast;
+use micro_timer::timed;
 use std::path::PathBuf;
 use std::{collections::BTreeMap, convert::TryInto};
 
@@ -499,6 +500,7 @@
         self.dirty_parents = true;
     }
 
+    #[timed]
     fn read<'a>(
         &mut self,
         file_contents: &'a [u8],

--- a/rust/hg-core/src/dirstate_tree/status.rs	Tue Apr 27 14:20:48 2021 +0200
+++ b/rust/hg-core/src/dirstate_tree/status.rs	Tue Apr 27 17:49:38 2021 +0200
@@ -13,6 +13,7 @@
 use crate::PatternFileWarning;
 use crate::StatusError;
 use crate::StatusOptions;
+use micro_timer::timed;
 use rayon::prelude::*;
 use std::borrow::Cow;
 use std::io;
@@ -29,6 +30,7 @@
 /// and its use of `itertools::merge_join_by`. When reaching a path that only
 /// exists in one of the two trees, depending on information requested by
 /// `options` we may need to traverse the remaining subtree.
+#[timed]
 pub fn status<'tree>(
     dmap: &'tree mut DirstateMap,
     matcher: &(dyn Matcher + Sync),