chore: tweak rustc flags (#5293)

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

.cargo/config

@@ -4,8 +4,13 @@ rustflags = [
     # Fix `perf` as suggested by https://github.com/flamegraph-rs/flamegraph/blob/2d19a162df4066f37d58d5471634f0bd9f0f4a62/README.md?plain=1#L18
     # Also see https://bugs.chromium.org/p/chromium/issues/detail?id=919499#c16
     "-C", "link-arg=-Wl,--no-rosegment",
+    # Enable all features supported by CPUs more recent than haswell (2013)
+    "-C", "target-cpu=haswell"
 ]
 
 [env]
-# set `ROARING_ARC` in all processes run by cargo
+
+# set `ROARING_ARCH` in all processes run by cargo
+# workaround dynamic CPU detection bug in croaring
+# https://github.com/influxdata/influxdb_iox/pull/2119
 ROARING_ARCH = { value = "haswell", force = true }

.circleci/config.yml

@@ -347,12 +347,8 @@ jobs:
     environment:
       # Disable incremental compilation to avoid overhead. We are not preserving these files anyway.
       CARGO_INCREMENTAL: "0"
-      # We keep the debug symbols (Enabled in Cargo.toml as debug = true)
-      # workaround dynamic CPU detection bug in croaring
-      # https://github.com/influxdata/influxdb_iox/pull/2119
-      ROARING_ARCH: "haswell"
-      # Use avx512 instructions to take full advantage of the CPUs instruction set
-      RUSTFLAGS: "-C target-feature=+avx2 -C link-arg=-fuse-ld=lld --cfg tokio_unstable"
+      # Enable tokio-console
+      RUSTFLAGS: "--cfg tokio_unstable"
       # https://github.com/rust-lang/cargo/issues/10280
       CARGO_NET_GIT_FETCH_WITH_CLI: "true"
     steps: