Print component information (#859)

crates/prover/src/constraint_framework/component.rs

@@ -1,4 +1,5 @@
 use std::borrow::Cow;
+use std::fmt::{self, Display, Formatter};
 use std::iter::zip;
 use std::ops::Deref;
 
@@ -264,3 +265,33 @@ impl<E: FrameworkEval> Deref for FrameworkComponent<E> {
         &self.eval
     }
 }
+
+impl<E: FrameworkEval> Display for FrameworkComponent<E> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        let log_n_rows = self.log_size();
+        let mut n_cols = vec![];
+        self.trace_log_degree_bounds()
+            .0
+            .iter()
+            .for_each(|interaction| {
+                n_cols.push(interaction.len());
+            });
+        writeln!(f, "n_rows 2^{}", log_n_rows)?;
+        writeln!(f, "n_constraints {}", self.n_constraints())?;
+        writeln!(
+            f,
+            "constraint_log_degree_bound {}",
+            self.max_constraint_log_degree_bound()
+        )?;
+        writeln!(
+            f,
+            "total felts: 2^{} * {}",
+            log_n_rows,
+            n_cols.iter().sum::<usize>()
+        )?;
+        for (j, n_cols) in n_cols.into_iter().enumerate() {
+            writeln!(f, "\t Interaction {}: n_cols {}", j, n_cols)?;
+        }
+        Ok(())
+    }
+}

crates/prover/src/examples/poseidon/mod.rs

@@ -3,7 +3,7 @@
 use std::ops::{Add, AddAssign, Mul, Sub};
 
 use itertools::Itertools;
-use tracing::{span, Level};
+use tracing::{info, span, Level};
 
 use crate::constraint_framework::constant_columns::gen_is_first;
 use crate::constraint_framework::logup::{LogupAtRow, LogupTraceGenerator, LookupElements};
@@ -386,6 +386,7 @@ pub fn prove_poseidon(
             total_sum,
         },
     );
+    info!("Poseidon component info:\n{}", component);
     let proof = prove(&[&component], channel, commitment_scheme).unwrap();
 
     (component, proof)