Remove time dependency

README.md

@@ -11,10 +11,8 @@ Rust-PHF is a library to generate efficient lookup tables at compile time using
 It currently uses the
 [CHD algorithm](http://cmph.sourceforge.net/papers/esa09.pdf) and can generate
 a 100,000 entry map in roughly .4 seconds. By default statistics are not
-produced, but if you use the `phf_mac` crate with the `stats` feature enabled
-(writing `phf_macros/stats` in the `[dependencies]` section of your
-`Cargo.toml` instead of `phf_macros`) and set the environment variable
-`PHF_STATS` it will issue a compiler note about how long it took.
+produced, but if you set the environment variable `PHF_STATS` it will issue
+a compiler note about how long it took.
 
 Usage
 =====

phf_macros/Cargo.toml

@@ -14,13 +14,14 @@ plugin = true
 test = false
 
 [features]
-stats = ["time"]
 unicase_support = ["unicase", "phf_shared/unicase"]
 
+# Deprecated
+stats = []
+
 [dependencies]
 phf_generator = { version = "=0.7.20", path = "../phf_generator" }
 phf_shared = { version = "=0.7.20", path = "../phf_shared" }
-time = { version = "0.1", optional = true }
 unicase = { version = "1.4", optional = true }
 
 [dev-dependencies]

phf_macros/src/lib.rs

@@ -34,8 +34,6 @@
 #![feature(plugin_registrar, quote, rustc_private)]
 
 extern crate syntax;
-#[cfg(feature = "stats")]
-extern crate time;
 extern crate rustc_plugin;
 extern crate phf_shared;
 extern crate phf_generator;
@@ -44,6 +42,7 @@ extern crate unicase;
 
 use std::collections::HashMap;
 use std::collections::hash_map::Entry::{Occupied, Vacant};
+use std::time::Instant;
 use syntax::ast::{self, Expr, ExprKind, Mutability, TyKind};
 use syntax::tokenstream::TokenTree;
 use syntax::codemap::Span;
@@ -77,18 +76,12 @@ pub fn macro_registrar(reg: &mut Registry) {
 }
 
 fn generate_hash(cx: &mut ExtCtxt, sp: Span, entries: &[Entry]) -> HashState {
-    #[cfg(feature = "stats")]
-    use time::precise_time_s;
-    #[cfg(not(feature = "stats"))]
-    fn precise_time_s() -> f64 {
-        0.
-    }
-
-    let start = precise_time_s();
+    let start = Instant::now();
     let state = phf_generator::generate_hash(entries);
-    let time = precise_time_s() - start;
+    let time = Instant::now() - start;
 
-    if cfg!(feature = "stats") && env::var_os("PHF_STATS").is_some() {
+    if env::var_os("PHF_STATS").is_some() {
+        let time = time.as_secs() as f64 + (time.subsec_nanos() as f64 / 1_000_000_000.);
         cx.parse_sess
           .span_diagnostic
           .span_note_without_error(sp, &format!("PHF generation took {} seconds", time));