diff --git a/scripts/code.py b/scripts/code.py
index ba7dc528..6769cbd8 100755
--- a/scripts/code.py
+++ b/scripts/code.py
@@ -525,6 +525,9 @@ def main(obj_paths, *,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('code_'+k in r and r['code_'+k].strip()
+                        for k in CodeResult._fields):
+                    continue
                 try:
                     results.append(CodeResult(
                         **{k: r[k] for k in CodeResult._by
@@ -566,6 +569,9 @@ def main(obj_paths, *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('code_'+k in r and r['code_'+k].strip()
+                            for k in CodeResult._fields):
+                        continue
                     try:
                         diff_results.append(CodeResult(
                             **{k: r[k] for k in CodeResult._by
diff --git a/scripts/cov.py b/scripts/cov.py
index dd12f05d..e6a7d632 100755
--- a/scripts/cov.py
+++ b/scripts/cov.py
@@ -596,6 +596,9 @@ def main(gcda_paths, *,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('cov_'+k in r and r['cov_'+k].strip()
+                        for k in CovResult._fields):
+                    continue
                 try:
                     results.append(CovResult(
                         **{k: r[k] for k in CovResult._by
@@ -639,6 +642,9 @@ def main(gcda_paths, *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('cov_'+k in r and r['cov_'+k].strip()
+                            for k in CovResult._fields):
+                        continue
                     try:
                         diff_results.append(CovResult(
                             **{k: r[k] for k in CovResult._by
diff --git a/scripts/data.py b/scripts/data.py
index 37d70c94..102059b4 100755
--- a/scripts/data.py
+++ b/scripts/data.py
@@ -566,6 +566,9 @@ def main(obj_paths, *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('data_'+k in r and r['data_'+k].strip()
+                            for k in DataResult._fields):
+                        continue
                     try:
                         diff_results.append(DataResult(
                             **{k: r[k] for k in DataResult._by
diff --git a/scripts/perf.py b/scripts/perf.py
index 863805fe..b6448580 100755
--- a/scripts/perf.py
+++ b/scripts/perf.py
@@ -1032,6 +1032,9 @@ def report(perf_paths, *,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('perf_'+k in r and r['perf_'+k].strip()
+                        for k in PerfResult._fields):
+                    continue
                 try:
                     results.append(PerfResult(
                         **{k: r[k] for k in PerfResult._by
@@ -1073,6 +1076,9 @@ def report(perf_paths, *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('perf_'+k in r and r['perf_'+k].strip()
+                            for k in PerfResult._fields):
+                        continue
                     try:
                         diff_results.append(PerfResult(
                             **{k: r[k] for k in PerfResult._by
diff --git a/scripts/perfbd.py b/scripts/perfbd.py
index 7320da60..3a43101b 100755
--- a/scripts/perfbd.py
+++ b/scripts/perfbd.py
@@ -1012,6 +1012,9 @@ def report(obj_path='', trace_paths=[], *,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('perfbd_'+k in r and r['perfbd_'+k].strip()
+                        for k in PerfBdResult._fields):
+                    continue
                 try:
                     results.append(PerfBdResult(
                         **{k: r[k] for k in PerfBdResult._by
@@ -1053,6 +1056,9 @@ def report(obj_path='', trace_paths=[], *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('perfbd_'+k in r and r['perfbd_'+k].strip()
+                            for k in PerfBdResult._fields):
+                        continue
                     try:
                         diff_results.append(PerfBdResult(
                             **{k: r[k] for k in PerfBdResult._by
diff --git a/scripts/stack.py b/scripts/stack.py
index b455c824..cc78fe11 100755
--- a/scripts/stack.py
+++ b/scripts/stack.py
@@ -550,6 +550,9 @@ def main(ci_paths,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('stack_'+k in r and r['stack_'+k].strip()
+                        for k in StackResult._fields):
+                    continue
                 try:
                     results.append(StackResult(
                         **{k: r[k] for k in StackResult._by
@@ -591,6 +594,9 @@ def main(ci_paths,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('stack_'+k in r and r['stack_'+k].strip()
+                            for k in StackResult._fields):
+                        continue
                     try:
                         diff_results.append(StackResult(
                             **{k: r[k] for k in StackResult._by
diff --git a/scripts/struct_.py b/scripts/struct_.py
index bea1b315..8897db6f 100755
--- a/scripts/struct_.py
+++ b/scripts/struct_.py
@@ -473,6 +473,9 @@ def main(obj_paths, *,
         with openio(args['use']) as f:
             reader = csv.DictReader(f, restval='')
             for r in reader:
+                if not any('struct_'+k in r and r['struct_'+k].strip()
+                        for k in StructResult._fields):
+                    continue
                 try:
                     results.append(StructResult(
                         **{k: r[k] for k in StructResult._by
@@ -516,6 +519,9 @@ def main(obj_paths, *,
             with openio(args['diff']) as f:
                 reader = csv.DictReader(f, restval='')
                 for r in reader:
+                    if not any('struct_'+k in r and r['struct_'+k].strip()
+                            for k in StructResult._fields):
+                        continue
                     try:
                         diff_results.append(StructResult(
                             **{k: r[k] for k in StructResult._by
diff --git a/scripts/summary.py b/scripts/summary.py
index a0be3a8d..3d1e2263 100755
--- a/scripts/summary.py
+++ b/scripts/summary.py
@@ -311,7 +311,7 @@ def infer(results, *,
     # create result class
     def __new__(cls, **r):
         return cls.__mro__[1].__new__(cls,
-            **{k: r.get(k) for k in by},
+            **{k: r.get(k, '') for k in by},
             **{k: r[k] if k in r and isinstance(r[k], list)
                 else [types[k](r[k])] if k in r
                 else []
@@ -631,6 +631,9 @@ def main(csv_paths, *,
         renames=renames)
     results_ = []
     for r in results:
+        if not any(k in r and r[k].strip()
+                for k in Result._fields):
+            continue
         try:
             results_.append(Result(**{
                 k: r[k] for k in Result._by + Result._fields
@@ -676,6 +679,9 @@ def main(csv_paths, *,
                                 r_[new_k] = r[old_k]
                         r.update(r_)
 
+                    if not any(k in r and r[k].strip()
+                            for k in Result._fields):
+                        continue
                     try:
                         diff_results.append(Result(**{
                             k: r[k] for k in Result._by + Result._fields