jayzhan211 commented on code in PR #12116:
URL: https://github.com/apache/datafusion/pull/12116#discussion_r1731979153


##########
datafusion/functions/benches/union_extract.rs:
##########
@@ -0,0 +1,1121 @@
+#[macro_use]
+extern crate criterion;
+
+use crate::criterion::Criterion;
+use arrow::{
+    array::{
+        Array, BooleanArray, Int32Array, Int8Array, NullArray, StringArray, 
UnionArray,
+    },
+    datatypes::{DataType, Field, Int32Type, Int8Type, UnionFields, UnionMode},
+    util::bench_util::{
+        create_boolean_array, create_primitive_array, create_string_array,
+    },
+};
+use arrow_buffer::ScalarBuffer;
+use criterion::black_box;
+use datafusion_common::ScalarValue;
+use datafusion_expr::{ColumnarValue, ScalarUDFImpl};
+use datafusion_functions::core::union_extract::{
+    eq_scalar_generic, is_sequential_generic, UnionExtractFun,
+};
+use itertools::repeat_n;
+use rand::random;
+use std::sync::Arc;
+
+fn criterion_benchmark(c: &mut Criterion) {
+    let union_extract = UnionExtractFun::new();
+

Review Comment:
   I'm not sure do we even need this 🤔 



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