diff --git a/benches/benchmarks.rs b/benches/benchmarks.rs
index a7beedbbad67..e4591290f5ce 100644
--- a/benches/benchmarks.rs
+++ b/benches/benchmarks.rs
@@ -2,7 +2,9 @@ use criterion::{criterion_group, criterion_main, BatchSize, Criterion};
 use nu_cli::eval_source;
 use nu_parser::parse;
 use nu_plugin::{Encoder, EncodingType, PluginCallResponse, PluginOutput};
-use nu_protocol::{engine::EngineState, PipelineData, Span, Value};
+use nu_protocol::{
+    engine::EngineState, eval_const::create_nu_constant, PipelineData, Span, Value, NU_VARIABLE_ID,
+};
 use nu_utils::{get_default_config, get_default_env};
 use std::path::{Path, PathBuf};
 
@@ -61,34 +63,6 @@ fn parser_benchmarks(c: &mut Criterion) {
             BatchSize::SmallInput,
         )
     });
-
-    c.bench_function("eval default_env.nu", |b| {
-        b.iter(|| {
-            let mut stack = nu_protocol::engine::Stack::new();
-            eval_source(
-                &mut engine_state,
-                &mut stack,
-                get_default_env().as_bytes(),
-                "default_env.nu",
-                PipelineData::empty(),
-                false,
-            )
-        })
-    });
-
-    c.bench_function("eval default_config.nu", |b| {
-        b.iter(|| {
-            let mut stack = nu_protocol::engine::Stack::new();
-            eval_source(
-                &mut engine_state,
-                &mut stack,
-                get_default_config().as_bytes(),
-                "default_config.nu",
-                PipelineData::empty(),
-                false,
-            )
-        })
-    });
 }
 
 fn eval_benchmarks(c: &mut Criterion) {
@@ -101,6 +75,10 @@ fn eval_benchmarks(c: &mut Criterion) {
         Value::string(home_path.to_string_lossy(), Span::test_data()),
     );
 
+    let nu_const = create_nu_constant(&engine_state, Span::unknown())
+        .expect("Failed to create nushell constant.");
+    engine_state.set_variable_const_val(NU_VARIABLE_ID, nu_const);
+
     c.bench_function("eval default_env.nu", |b| {
         b.iter(|| {
             let mut stack = nu_protocol::engine::Stack::new();
@@ -143,7 +121,7 @@ fn encoding_test_data(row_cnt: usize, col_cnt: usize) -> Value {
 
 fn encoding_benchmarks(c: &mut Criterion) {
     let mut group = c.benchmark_group("Encoding");
-    let test_cnt_pairs = [(100, 5), (100, 15), (10000, 5), (10000, 15)];
+    let test_cnt_pairs = [(100, 5), (10000, 15)];
     for (row_cnt, col_cnt) in test_cnt_pairs.into_iter() {
         for fmt in ["json", "msgpack"] {
             group.bench_function(&format!("{fmt} encode {row_cnt} * {col_cnt}"), |b| {
@@ -162,7 +140,7 @@ fn encoding_benchmarks(c: &mut Criterion) {
 
 fn decoding_benchmarks(c: &mut Criterion) {
     let mut group = c.benchmark_group("Decoding");
-    let test_cnt_pairs = [(100, 5), (100, 15), (10000, 5), (10000, 15)];
+    let test_cnt_pairs = [(100, 5), (10000, 15)];
     for (row_cnt, col_cnt) in test_cnt_pairs.into_iter() {
         for fmt in ["json", "msgpack"] {
             group.bench_function(&format!("{fmt} decode for {row_cnt} * {col_cnt}"), |b| {