diff --git a/proto/anki/deck_config.proto b/proto/anki/deck_config.proto
index bb9ead778..d983f10ea 100644
--- a/proto/anki/deck_config.proto
+++ b/proto/anki/deck_config.proto
@@ -193,6 +193,7 @@ message DeckConfig {
     reserved 39;
     float historical_retention = 40;
     string param_search = 45;
+    bool health_check = 47;
 
     bytes other = 255;
   }
diff --git a/proto/anki/scheduler.proto b/proto/anki/scheduler.proto
index 59372c64e..9bdde403e 100644
--- a/proto/anki/scheduler.proto
+++ b/proto/anki/scheduler.proto
@@ -354,6 +354,7 @@ message ComputeFsrsParamsRequest {
   repeated float current_params = 2;
   int64 ignore_revlogs_before_ms = 3;
   uint32 num_of_relearning_steps = 4;
+  bool health_check = 5;
 }
 
 message ComputeFsrsParamsResponse {
diff --git a/rslib/src/deckconfig/mod.rs b/rslib/src/deckconfig/mod.rs
index c522ea18a..c6ba7f8c6 100644
--- a/rslib/src/deckconfig/mod.rs
+++ b/rslib/src/deckconfig/mod.rs
@@ -78,6 +78,7 @@ const DEFAULT_DECK_CONFIG_INNER: DeckConfigInner = DeckConfigInner {
     fsrs_params_5: vec![],
     fsrs_params_6: vec![],
     desired_retention: 0.9,
+    health_check: false,
     other: Vec::new(),
     historical_retention: 0.9,
     param_search: String::new(),
diff --git a/rslib/src/deckconfig/schema11.rs b/rslib/src/deckconfig/schema11.rs
index 2d862a3a0..ac5979c1c 100644
--- a/rslib/src/deckconfig/schema11.rs
+++ b/rslib/src/deckconfig/schema11.rs
@@ -400,6 +400,7 @@ impl From<DeckConfSchema11> for DeckConfig {
                 desired_retention: c.desired_retention,
                 historical_retention: c.sm2_retention,
                 param_search: c.param_search,
+                health_check: false,
                 other: other_bytes,
             },
         }
diff --git a/rslib/src/deckconfig/update.rs b/rslib/src/deckconfig/update.rs
index 6d49bc5b1..5a85d92e1 100644
--- a/rslib/src/deckconfig/update.rs
+++ b/rslib/src/deckconfig/update.rs
@@ -372,6 +372,7 @@ impl Collection {
                 config_len,
                 config.fsrs_params(),
                 num_of_relearning_steps,
+                false,
             ) {
                 Ok(params) => {
                     println!("{}: {:?}", config.name, params.params);
diff --git a/rslib/src/scheduler/fsrs/params.rs b/rslib/src/scheduler/fsrs/params.rs
index e30efba0e..45ab0a3c0 100644
--- a/rslib/src/scheduler/fsrs/params.rs
+++ b/rslib/src/scheduler/fsrs/params.rs
@@ -55,6 +55,7 @@ impl Collection {
     /// Note this does not return an error if there are less than 400 items -
     /// the caller should instead check the fsrs_items count in the return
     /// value.
+    #[allow(clippy::too_many_arguments)]
     pub fn compute_params(
         &mut self,
         search: &str,
@@ -63,6 +64,7 @@ impl Collection {
         total_presets: u32,
         current_params: &Params,
         num_of_relearning_steps: usize,
+        health_check: bool,
     ) -> Result<ComputeFsrsParamsResponse> {
         self.clear_progress();
         let timing = self.timing_today()?;
@@ -75,7 +77,7 @@ impl Collection {
             return Ok(ComputeFsrsParamsResponse {
                 params: current_params.to_vec(),
                 fsrs_items,
-                log_loss: None
+                log_loss: None,
             });
         }
         // adapt the progress handler to our built-in progress handling
@@ -148,9 +150,14 @@ impl Collection {
             }
         }
 
-        let fsrs = FSRS::new(None)?;
-        let log_loss = fsrs
-            .evaluate_with_time_series_splits(input, |_| true).ok().map(|eval| eval.log_loss);
+        let log_loss = if health_check && *current_params != params {
+            let fsrs = FSRS::new(None)?;
+            fsrs.evaluate_with_time_series_splits(input, |_| true)
+                .ok()
+                .map(|eval| eval.log_loss)
+        } else {
+            None
+        };
 
         Ok(ComputeFsrsParamsResponse {
             params,
diff --git a/rslib/src/scheduler/service/mod.rs b/rslib/src/scheduler/service/mod.rs
index 2ab647061..fde64007f 100644
--- a/rslib/src/scheduler/service/mod.rs
+++ b/rslib/src/scheduler/service/mod.rs
@@ -271,6 +271,7 @@ impl crate::services::SchedulerService for Collection {
             1,
             &input.current_params,
             input.num_of_relearning_steps as usize,
+            input.health_check,
         )
     }
 
@@ -372,7 +373,11 @@ impl crate::services::BackendSchedulerService for Backend {
             enable_short_term: true,
             num_relearning_steps: None,
         })?;
-        Ok(ComputeFsrsParamsResponse { params, fsrs_items, log_loss: None })
+        Ok(ComputeFsrsParamsResponse {
+            params,
+            fsrs_items,
+            log_loss: None,
+        })
     }
 
     fn fsrs_benchmark(
diff --git a/ts/routes/deck-options/FsrsOptions.svelte b/ts/routes/deck-options/FsrsOptions.svelte
index 866a71fdc..c657670e0 100644
--- a/ts/routes/deck-options/FsrsOptions.svelte
+++ b/ts/routes/deck-options/FsrsOptions.svelte
@@ -179,6 +179,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
                         ignoreRevlogsBeforeMs: getIgnoreRevlogsBeforeMs(),
                         currentParams: params,
                         numOfRelearningSteps: numOfRelearningStepsInDay,
+                        healthCheck: $config.healthCheck,
                     });
 
                     const already_optimal =
@@ -196,7 +197,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
                     } else {
                         $config.fsrsParams6 = resp.params;
                         optimized = true;
-                        console.log(`FSRS-test-train-split-log-loss = ${resp.logLoss}`)
+                        console.log(`FSRS-test-train-split-log-loss = ${resp.logLoss}`);
                         if (resp.logLoss && resp.logLoss > logLossBadThreshold) {
                             setTimeout(() => alert(tr.deckConfigFsrsBadFitWarning()));
                         }
@@ -328,17 +329,24 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
             {tr.deckConfigOptimizeButton()}
         {/if}
     </button>
-    <button
-        class="btn {checkingParams ? 'btn-warning' : 'btn-primary'}"
-        disabled={!checkingParams && computing}
-        on:click={() => checkParams()}
-    >
-        {#if checkingParams}
-            {tr.actionsCancel()}
-        {:else}
-            {tr.deckConfigEvaluateButton()}
-        {/if}
-    </button>
+    <label>
+        <input type="checkbox" bind:checked={$config.healthCheck} />
+        Health check (Slow)
+    </label>
+    {#if false}
+        <!-- Can be re-enabled by some method in the future -->
+        <button
+            class="btn {checkingParams ? 'btn-warning' : 'btn-primary'}"
+            disabled={!checkingParams && computing}
+            on:click={() => checkParams()}
+        >
+            {#if checkingParams}
+                {tr.actionsCancel()}
+            {:else}
+                {tr.deckConfigEvaluateButton()}
+            {/if}
+        </button>
+    {/if}
     <div>
         {#if computingParams || checkingParams}
             {computeParamsProgressString}