Disable the quanta feature by default

.github/workflows/CI.yml

@@ -103,5 +103,8 @@ jobs:
       - name: Run tests (future feature, but no sync feature)
         run: cargo test --features future
 
+      - name: Run tests (release, future feature, but no sync feature)
+        run: cargo test --release --features future
+
       - name: Run tests (future, sync and logging features)
         run: cargo test --features 'future, sync, logging'

.github/workflows/CIArm64.yml

@@ -55,7 +55,7 @@ jobs:
       - name: Run tests (sync feature, drop cache)
         run: cargo test --release --lib --features sync sync::cache::tests::ensure_gc_runs_when_dropping_cache -- --exact --ignored
 
-      - name: Run tests (future feature, but no sync feature)
+      - name: Run tests (future feature)
         run: cargo test --features future
         env:
           RUSTFLAGS: '--cfg skip_large_mem_tests'

.github/workflows/CIQuantaDisabled.yml → .github/workflows/CIQuantaEnabled.yml

@@ -1,4 +1,4 @@
-name: CI (Quanta disabled)
+name: CI (Quanta enabled)
 
 on:
   push:
@@ -67,21 +67,27 @@ jobs:
         if: ${{ matrix.rust == '1.70.0' }}
         run: ./.ci_extras/remove-examples-msrv.sh
 
-      - name: Run tests (debug, but no quanta feature)
-        run: cargo test --no-default-features --features sync
+      - name: Show cargo tree
+        run: cargo tree --features 'sync, future, quanta'
+
+      - name: Run tests (debug, sync, quanta features)
+        run: cargo test --features 'sync, quanta'
         env:
           RUSTFLAGS: '--cfg rustver'
 
-      - name: Run tests (release, but no quanta feature)
-        run: cargo test --release --no-default-features --features sync
+      - name: Run tests (release, sync, quanta features)
+        run: cargo test --release --features 'sync, quanta'
         env:
           RUSTFLAGS: '--cfg rustver'
 
-      - name: Run tests (future feature, but no quanta and sync features)
-        run: cargo test --no-default-features --features future
+      - name: Run tests (debug, future, quanta features)
+        run: cargo test --features 'future, quanta'
+
+      - name: Run tests (release, future, quanta features)
+        run: cargo test --release --features 'future, quanta'
 
-      - name: Run tests (future, sync and logging features, but no quanta feature)
-        run: cargo test --no-default-features --features 'sync, future, logging'
+      - name: Run tests (future, sync, logging, quanta features)
+        run: cargo test --features 'sync, future, quanta, logging'
 
-      - name: Run tests (sync feature, but no quanta feature, drop cache)
-        run: cargo test --release --lib --no-default-features --features sync sync::cache::tests::ensure_gc_runs_when_dropping_cache -- --exact --ignored
+      - name: Run tests (sync, quanta features, drop cache)
+        run: cargo test --release --lib --features 'sync, quanta' sync::cache::tests::ensure_gc_runs_when_dropping_cache -- --exact --ignored

.github/workflows/Codecov.yml

@@ -28,8 +28,8 @@ jobs:
         env:
           RUSTFLAGS: '--cfg rustver'
 
-      - name: Run tests (no quanta feature)
-        run: cargo llvm-cov --no-report --no-default-features --features 'sync, future'
+      - name: Run tests (with quanta feature)
+        run: cargo llvm-cov --no-report --features 'sync, future, quanta'
         env:
           RUSTFLAGS: '--cfg rustver'
 

Cargo.toml

@@ -16,7 +16,7 @@ exclude = [".devcontainer", ".github", ".gitpod.yml", ".vscode"]
 build = "build.rs"
 
 [features]
-default = ["quanta"]
+default = []
 
 # Enable this feature to use `moka::sync::{Cache, SegmentedCache}`
 sync = []
@@ -29,8 +29,10 @@ future = ["async-lock", "event-listener", "futures-util"]
 # callback closure.
 logging = ["log"]
 
-# This feature is enabled by default. It will slightly speed up some cache operations
-# by using the `quanta` crate to measure time.
+# Enable this feature to use `quanta::Instant` in some performance critical
+# operations in the cache instead of `std::time::Instant`. As of v0.12.10, this
+# feature will not make any noticeable performance difference, but in the future
+# when cache metrics are added, it will be useful to have this feature enabled.
 quanta = ["dep:quanta"]
 
 # This is an old feature and has no effect in v0.12.10 or newer. It is kept for