solana-test-validator: Use jemallocator (#10085)

Agave is absurdly slow when using glibc allocator. Even though test
validator should not be treated as a direct indicator of performance,
it should still be fast enough for people to play with it.

Author: vadorovsky

validator/src/bin/solana-test-validator.rs

@@ -43,6 +43,10 @@ use {
     },
 };
 
+#[cfg(not(any(target_env = "msvc", target_os = "freebsd")))]
+#[global_allocator]
+static GLOBAL: jemallocator::Jemalloc = jemallocator::Jemalloc;
+
 #[derive(PartialEq, Eq)]
 enum Output {
     None,