diff --git a/script/src/syscalls/debugger.rs b/script/src/syscalls/debugger.rs
index 5c5b6d5195..4bc2514f76 100644
--- a/script/src/syscalls/debugger.rs
+++ b/script/src/syscalls/debugger.rs
@@ -35,6 +35,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for Debugger<'a> {
             addr += 1;
         }
 
+        machine.add_cycles((buffer.len() as u64 + 1) * 10);
         let s = String::from_utf8(buffer).map_err(|_| VMError::ParseError)?;
         debug!(target: "script", "{} DEBUG OUTPUT: {}", self.prefix, s);
         Ok(true)
diff --git a/script/src/syscalls/load_cell.rs b/script/src/syscalls/load_cell.rs
index 5f5bd7fdc8..455d1147e9 100644
--- a/script/src/syscalls/load_cell.rs
+++ b/script/src/syscalls/load_cell.rs
@@ -47,6 +47,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadCell<'a> {
         if machine.registers()[A7].to_u64() != LOAD_CELL_SYSCALL_NUMBER {
             return Ok(false);
         }
+        machine.add_cycles(100);
 
         let addr = machine.registers()[A0].to_usize();
         let size_addr = machine.registers()[A1].to_usize();
@@ -84,6 +85,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadCell<'a> {
             .memory_mut()
             .store_bytes(addr, &data[offset..offset + real_size])?;
         machine.registers_mut()[A0] = R::from_u8(SUCCESS);
+        machine.add_cycles(data.len() as u64 * 100);
         Ok(true)
     }
 }
diff --git a/script/src/syscalls/load_cell_by_field.rs b/script/src/syscalls/load_cell_by_field.rs
index 609462b133..246d4064fb 100644
--- a/script/src/syscalls/load_cell_by_field.rs
+++ b/script/src/syscalls/load_cell_by_field.rs
@@ -49,6 +49,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadCellByField<'a> {
         if machine.registers()[A7].to_u64() != LOAD_CELL_BY_FIELD_SYSCALL_NUMBER {
             return Ok(false);
         }
+        machine.add_cycles(10);
 
         let index = machine.registers()[A3].to_usize();
         let source = Source::parse_from_u64(machine.registers()[A4].to_u64())?;
@@ -61,24 +62,27 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadCellByField<'a> {
         }
         let cell = cell.unwrap();
 
-        let return_code = match field {
+        let (return_code, data_length) = match field {
             CellField::Capacity => {
                 let mut buffer = vec![];
                 buffer.write_u64::<LittleEndian>(cell.capacity)?;
                 store_data(machine, &buffer)?;
-                SUCCESS
+                (SUCCESS, buffer.len())
             }
             CellField::Data => {
                 store_data(machine, &cell.data)?;
-                SUCCESS
+                (SUCCESS, cell.data.len())
             }
             CellField::DataHash => {
-                store_data(machine, &cell.data_hash().as_bytes())?;
-                SUCCESS
+                let hash = cell.data_hash();
+                let bytes = hash.as_bytes();
+                store_data(machine, &bytes)?;
+                (SUCCESS, bytes.len())
             }
             CellField::LockHash => {
-                store_data(machine, &cell.lock.as_bytes())?;
-                SUCCESS
+                let bytes = cell.lock.as_bytes();
+                store_data(machine, &bytes)?;
+                (SUCCESS, bytes.len())
             }
             CellField::Type => match cell.type_ {
                 Some(ref type_) => {
@@ -87,19 +91,22 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadCellByField<'a> {
                     builder.finish(offset, None);
                     let data = builder.finished_data();
                     store_data(machine, data)?;
-                    SUCCESS
+                    (SUCCESS, data.len())
                 }
-                None => ITEM_MISSING,
+                None => (ITEM_MISSING, 0),
             },
             CellField::TypeHash => match cell.type_ {
                 Some(ref type_) => {
-                    store_data(machine, &type_.type_hash().as_bytes())?;
-                    SUCCESS
+                    let hash = type_.type_hash();
+                    let bytes = hash.as_bytes();
+                    store_data(machine, &bytes)?;
+                    (SUCCESS, bytes.len())
                 }
-                None => ITEM_MISSING,
+                None => (ITEM_MISSING, 0),
             },
         };
         machine.registers_mut()[A0] = R::from_u8(return_code);
+        machine.add_cycles(data_length as u64 * 10);
         Ok(true)
     }
 }
diff --git a/script/src/syscalls/load_input_by_field.rs b/script/src/syscalls/load_input_by_field.rs
index 061a4f991e..815f34f811 100644
--- a/script/src/syscalls/load_input_by_field.rs
+++ b/script/src/syscalls/load_input_by_field.rs
@@ -40,6 +40,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadInputByField<'a> {
         if machine.registers()[A7].to_u64() != LOAD_INPUT_BY_FIELD_SYSCALL_NUMBER {
             return Ok(false);
         }
+        machine.add_cycles(10);
 
         let index = machine.registers()[A3].to_usize();
         let source = Source::parse_from_u64(machine.registers()[A4].to_u64())?;
@@ -52,13 +53,14 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadInputByField<'a> {
         }
         let input = input.unwrap();
 
-        match field {
+        let data_length = match field {
             InputField::Unlock => {
                 let mut builder = FlatBufferBuilder::new();
                 let offset = FbsScript::build(&mut builder, &input.unlock);
                 builder.finish(offset, None);
                 let data = builder.finished_data();
                 store_data(machine, data)?;
+                data.len()
             }
             InputField::OutPoint => {
                 let mut builder = FlatBufferBuilder::new();
@@ -66,9 +68,11 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadInputByField<'a> {
                 builder.finish(offset, None);
                 let data = builder.finished_data();
                 store_data(machine, data)?;
+                data.len()
             }
         };
         machine.registers_mut()[A0] = R::from_u8(SUCCESS);
+        machine.add_cycles(data_length as u64 * 10);
         Ok(true)
     }
 }
diff --git a/script/src/syscalls/load_tx.rs b/script/src/syscalls/load_tx.rs
index 066195b8dd..6bf47f9b04 100644
--- a/script/src/syscalls/load_tx.rs
+++ b/script/src/syscalls/load_tx.rs
@@ -36,6 +36,7 @@ impl<'a, R: Register, M: Memory> Syscalls<R, M> for LoadTx<'a> {
             .memory_mut()
             .store_bytes(addr, &data[offset..offset + real_size])?;
         machine.registers_mut()[A0] = R::from_u8(SUCCESS);
+        machine.add_cycles((data.len() as u64 + 1) * 10);
         Ok(true)
     }
 }