diff --git a/workflow/.gitignore b/workflow/.gitignore
index c77d435..659e6b8 100644
--- a/workflow/.gitignore
+++ b/workflow/.gitignore
@@ -1,3 +1,4 @@
 build/
 build_big/
+build*/
 tmp/
\ No newline at end of file
diff --git a/workflow/README.md b/workflow/README.md
index 0e21286..f9c1de1 100644
--- a/workflow/README.md
+++ b/workflow/README.md
@@ -16,28 +16,44 @@ NOTE: the examples below assume `bash`. In particular, it won't work with `zsh`
 
 To have an overview of what all the different steps and files are, see [PROOFS.md](PROOFS.md).
 
-### Some measurements
+### Some benchmarks
 
 Approximate time to run this on an M2 (8+4 cores), with 10 samples:
 
 - compiling the circuit: 8 seconds 
 - circuit-specific setup (with 1 contributor): 85 seconds
 - size of the `.zkey` file (only 1 contributor): 110 megabytes
+- generating the witness (WASM): 0.3 seconds
 - proving with `snarkjs` (slow): 7.7 seconds
+- proving wiht `zikkurat` (single threaded): 13 seconds
+- proving with `nim-groth16` (old version): 2 seconds
 
 Same with 50 samples:
 
 - compiling: 37 seconds
-- circuit-specific setup: ~420 seconds
+- circuit-specific setup: ~430 seconds
 - `.zkey` file: 525 megabytes
-- snarkjs prove: 34 seconds
+- generating the witness (WASM): 1.2 seconds
+- proving with `snarkjs`: 36 seconds
+- proving wiht `zikkurat` (single threaded): 52 seconds
+- proving with `nim-groth16` (old version): 9.4 seconds
 
 And with 100 samples:
-- compiling: 76 seconds
-- circuit-specific setup: ~1000 seconds
-- `.zkey` file
-- snarkjs prove: 76 seconds
 
+- compiling: 76 seconds
+- circuit-specific setup: ~1050 seconds
+- `.zkey` file
+- generating the witness (WASM): 2.3 seconds
+- proving with `snarkjs`: 76 seconds
+- proving wiht `zikkurat` (single threaded): 102 seconds
+- proving with `nim-groth16` (old version): 18 seconds
+
+TODO: 
+
+- add `arkworks` prover
+- add `rapidsnarks` prover (doesn't run on ARM)
+- update `nim-groth16` to `constantine-0.1` (should be faster because no workarounds)
+- add multithreading to `zikkurat`
 
 ### Preliminaries
 
diff --git a/workflow/cli_args.sh b/workflow/cli_args.sh
index 6ea183b..525791c 100755
--- a/workflow/cli_args.sh
+++ b/workflow/cli_args.sh
@@ -13,7 +13,9 @@ CLI_ARGS="--depth=$MAXDEPTH \
  --seed=$SEED \
  --nslots=$NSLOTS \
  --ncells=$NCELLS \
- --index=$SLOTINDEX"
+ --index=$SLOTINDEX \
+ --field=bn254 \
+ --hash=poseidon2"
 
 if [[ "$1" == "--export" ]]
 then
diff --git a/workflow/prove.sh b/workflow/prove.sh
index 8fcf7d5..cfd66c8 100755
--- a/workflow/prove.sh
+++ b/workflow/prove.sh
@@ -16,16 +16,18 @@ ${NIMCLI_DIR}/cli $CLI_ARGS -v --output=input.json
 
 # --- generate the witness ---
 
+start=`date +%s`
 echo ""
 echo "generating the witness..."
 cd ${CIRCUIT_MAIN}_js
 time node generate_witness.js ${CIRCUIT_MAIN}.wasm ../input.json ../witness.wtns
 cd ${ORIG}/build
+end=`date +%s`
+echo "Generating the witness took `expr $end - $start` seconds."
 
 # --- create the proof ---
 
 PROVER="snarkjs"
-# PROVER="nim"
 
 RS=`which rapidsnark`
 if [[ ! -z "$RS" ]]
@@ -33,9 +35,13 @@ then
   PROVER="rapidsnark"
 fi
 
+# PROVER="zikkurat"
+PROVER="nim"
+
 echo ""
 echo "creating the proof... using prover: \`$PROVER\`"
 
+start=`date +%s`
 case $PROVER in
   snarkjs)
     time snarkjs groth16 prove ${CIRCUIT_MAIN}.zkey witness.wtns proof.json public.json
@@ -46,11 +52,16 @@ case $PROVER in
   nim)
     time nim-groth16 -tpv --zkey=${CIRCUIT_MAIN}.zkey --wtns=witness.wtns -o=proof.json -i=public.json
     ;;
+  zikkurat)
+    time zikkurat-groth16 -tpv --zkey=${CIRCUIT_MAIN}.zkey --wtns=witness.wtns # -o=proof.json -i=public.json
+    ;;
   *)
     echo "unknown prover \`$PROVER\`"
     exit 99
     ;;
 esac
+end=`date +%s`
+echo "Creating the proof took `expr $end - $start` seconds."
 
 # --- verify the proof ---
 
diff --git a/workflow/setup.sh b/workflow/setup.sh
index 076fe65..bc0d9dc 100755
--- a/workflow/setup.sh
+++ b/workflow/setup.sh
@@ -14,8 +14,13 @@ ${NIMCLI_DIR}/cli $CLI_ARGS -v --circom=${CIRCUIT_MAIN}.circom
 
 # --- compile the circuit ---
 
+echo ""
+start=`date +%s`
 CIRCUIT_INCLUDES="-l${CIRCUIT_LIB_DIR} -l${CIRCUIT_POS_DIR} -l${CIRCUIT_PRF_DIR}"
-time circom --r1cs --wasm --O2 ${CIRCUIT_INCLUDES} ${CIRCUIT_MAIN}.circom
+circom --r1cs --wasm --O2 ${CIRCUIT_INCLUDES} ${CIRCUIT_MAIN}.circom
+end=`date +%s`
+echo "Compiling the circuit took `expr $end - $start` seconds."
+echo ""
 
 # --- circuit specific setup ---