diff --git a/app/corpora/cqi_over_sio/extensions.py b/app/corpora/cqi_over_sio/extensions.py
index 9f457c9b..903e51c3 100644
--- a/app/corpora/cqi_over_sio/extensions.py
+++ b/app/corpora/cqi_over_sio/extensions.py
@@ -12,7 +12,6 @@ import gzip
 import json
 import math
 import os
-import shutil
 from app import db
 from app.models import Corpus
 from .utils import lookups_by_cpos, partial_export_subcorpus, export_subcorpus
@@ -67,12 +66,12 @@ def ext_corpus_static_data(corpus: str) -> Dict:
     }
     for p_attr in cqi_p_attrs.values():
         static_corpus_data['corpus']['freqs'][p_attr.name] = {}
-        chunk_size = 5000
+        chunk_size = 10000
         p_attr_id_list = list(range(p_attr.lexicon_size))
         chunks = [p_attr_id_list[i:i+chunk_size] for i in range(0, len(p_attr_id_list), chunk_size)]
         del p_attr_id_list
         for chunk in chunks:
-            print(f'corpus.freqs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
+            # print(f'corpus.freqs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
             static_corpus_data['corpus']['freqs'][p_attr.name].update(
                 dict(zip(chunk, p_attr.freqs_by_ids(chunk)))
             )
@@ -82,7 +81,7 @@ def ext_corpus_static_data(corpus: str) -> Dict:
         chunks = [cpos_list[i:i+chunk_size] for i in range(0, len(cpos_list), chunk_size)]
         del cpos_list
         for chunk in chunks:
-            print(f'p_attrs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
+            # print(f'p_attrs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
             static_corpus_data['p_attrs'][p_attr.name].update(
                 dict(zip(chunk, p_attr.ids_by_cpos(chunk)))
             )
@@ -92,7 +91,7 @@ def ext_corpus_static_data(corpus: str) -> Dict:
         chunks = [p_attr_id_list[i:i+chunk_size] for i in range(0, len(p_attr_id_list), chunk_size)]
         del p_attr_id_list
         for chunk in chunks:
-            print(f'values.p_attrs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
+            # print(f'values.p_attrs.{p_attr.name}: {chunk[0]} - {chunk[-1]}')
             static_corpus_data['values']['p_attrs'][p_attr.name].update(
                 dict(zip(chunk, p_attr.values_by_ids(chunk)))
             )
@@ -123,7 +122,7 @@ def ext_corpus_static_data(corpus: str) -> Dict:
         #         static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['counts']['token'] = rbound - lbound + 1
         #     cqi_subcorpus.drop()
         for id in range(0, s_attr.size):
-            print(f's_attrs.{s_attr.name}.lexicon.{id}')
+            # print(f's_attrs.{s_attr.name}.lexicon.{id}')
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id] = {
                 'bounds': None,
                 'counts': None,
@@ -132,9 +131,9 @@ def ext_corpus_static_data(corpus: str) -> Dict:
             if s_attr.name != 'text':
                 continue
             lbound, rbound = s_attr.cpos_by_id(id)
-            print(f's_attrs.{s_attr.name}.lexicon.{id}.bounds')
+            # print(f's_attrs.{s_attr.name}.lexicon.{id}.bounds')
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['bounds'] = [lbound, rbound]
-            print(f's_attrs.{s_attr.name}.lexicon.{id}.counts')
+            # print(f's_attrs.{s_attr.name}.lexicon.{id}.counts')
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['counts'] = {}
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['counts']['token'] = rbound - lbound + 1
             cpos_list = list(range(lbound, rbound + 1))
@@ -142,22 +141,22 @@ def ext_corpus_static_data(corpus: str) -> Dict:
             del cpos_list
             ent_ids = set()
             for chunk in chunks:
-                print(f'Gather ent_ids from cpos: {chunk[0]} - {chunk[-1]}')
+                # print(f'Gather ent_ids from cpos: {chunk[0]} - {chunk[-1]}')
                 ent_ids.update({x for x in cqi_s_attrs['ent'].ids_by_cpos(chunk) if x != -1})
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['counts']['ent'] = len(ent_ids)
             del ent_ids
             s_ids = set()
             for chunk in chunks:
-                print(f'Gather s_ids from cpos: {chunk[0]} - {chunk[-1]}')
+                # print(f'Gather s_ids from cpos: {chunk[0]} - {chunk[-1]}')
                 s_ids.update({x for x in cqi_s_attrs['s'].ids_by_cpos(chunk) if x != -1})
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['counts']['s'] = len(s_ids)
             del s_ids
-            print(f's_attrs.{s_attr.name}.lexicon.{id}.freqs')
+            # print(f's_attrs.{s_attr.name}.lexicon.{id}.freqs')
             static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['freqs'] = {}
             for p_attr in cqi_p_attrs.values():
                 p_attr_ids = []
                 for chunk in chunks:
-                    print(f'Gather p_attr_ids from cpos: {chunk[0]} - {chunk[-1]}')
+                    # print(f'Gather p_attr_ids from cpos: {chunk[0]} - {chunk[-1]}')
                     p_attr_ids.extend(p_attr.ids_by_cpos(chunk))
                 static_corpus_data['s_attrs'][s_attr.name]['lexicon'][id]['freqs'][p_attr.name] = dict(Counter(p_attr_ids))
                 del p_attr_ids
@@ -178,9 +177,9 @@ def ext_corpus_static_data(corpus: str) -> Dict:
             sub_s_attr_values.append(tmp)
             del tmp
         del chunks
-        print(f's_attrs.{s_attr.name}.values')
+        # print(f's_attrs.{s_attr.name}.values')
         static_corpus_data['s_attrs'][s_attr.name]['values'] = s_attr_value_names
-        print(f'values.s_attrs.{s_attr.name}')
+        # print(f'values.s_attrs.{s_attr.name}')
         static_corpus_data['values']['s_attrs'][s_attr.name] = {
             s_attr_id: {
                 s_attr_value_name: sub_s_attr_values[s_attr_value_name_idx][s_attr_id_idx]