diff --git a/graph/src/blockchain/types.rs b/graph/src/blockchain/types.rs
index b2b802fbfac..081fff4eea5 100644
--- a/graph/src/blockchain/types.rs
+++ b/graph/src/blockchain/types.rs
@@ -17,7 +17,7 @@ use crate::data::graphql::IntoValue;
 use crate::data::store::scalar::Timestamp;
 use crate::derive::CheapClone;
 use crate::object;
-use crate::prelude::{r, BigInt, TryFromValue, Value, ValueMap};
+use crate::prelude::{r, Value};
 use crate::util::stable_hash_glue::{impl_stable_hash, AsBytes};
 
 /// A simple marker for byte arrays that are really block hashes
@@ -302,23 +302,6 @@ impl TryFrom<(&[u8], i64)> for BlockPtr {
     }
 }
 
-impl TryFromValue for BlockPtr {
-    fn try_from_value(value: &r::Value) -> Result<Self, anyhow::Error> {
-        match value {
-            r::Value::Object(o) => {
-                let number = o.get_required::<BigInt>("number")?.to_u64() as BlockNumber;
-                let hash = o.get_required::<BlockHash>("hash")?;
-
-                Ok(BlockPtr::new(hash, number))
-            }
-            _ => Err(anyhow!(
-                "failed to parse non-object value into BlockPtr: {:?}",
-                value
-            )),
-        }
-    }
-}
-
 impl IntoValue for BlockPtr {
     fn into_value(self) -> r::Value {
         object! {
diff --git a/graphql/src/execution/execution.rs b/graphql/src/execution/execution.rs
index ef04837d65c..7b1da1a3e95 100644
--- a/graphql/src/execution/execution.rs
+++ b/graphql/src/execution/execution.rs
@@ -431,17 +431,18 @@ pub(crate) async fn execute_root_selection_set<R: Resolver>(
         ctx.cache_status.store(CacheStatus::Shared);
     }
 
+    // Calculate the weight once outside the lock.
+    let weight = result.weight();
+
     // Check if this query should be cached.
     // Share errors from the herd cache, but don't store them in generational cache.
     // In particular, there is a problem where asking for a block pointer beyond the chain
     // head can cause the legitimate cache to be thrown out.
     // It would be redundant to insert herd cache hits.
-    let no_cache = herd_hit || result.has_errors() || result.weight() > *MAX_ENTRY_WEIGHT;
+    let no_cache = herd_hit || result.has_errors() || weight > *MAX_ENTRY_WEIGHT;
     if let (false, Some(key), Some(block_ptr), Some(network)) =
         (no_cache, key, block_ptr, &ctx.query.network)
     {
-        // Calculate the weight outside the lock.
-        let weight = result.weight();
         let shard = (key[0] as usize) % QUERY_BLOCK_CACHE.len();
         let inserted = QUERY_BLOCK_CACHE[shard].lock(&ctx.logger).insert(
             network,