diff --git a/include/sta/Sta.hh b/include/sta/Sta.hh
index 5eae24fb..e4e911a1 100644
--- a/include/sta/Sta.hh
+++ b/include/sta/Sta.hh
@@ -627,6 +627,7 @@ public:
   void reportSlewLimitVerbose(Pin *pin,
 			      const Corner *corner,
 			      const MinMax *min_max);
+  // requires checkSlewLimitPreamble()
   void checkSlew(const Pin *pin,
 		 const Corner *corner,
 		 const MinMax *min_max,
@@ -648,6 +649,7 @@ public:
 			      const MinMax *min_max);
   void reportFanoutLimitVerbose(Pin *pin,
 				const MinMax *min_max);
+  // requires checkFanoutLimitPreamble()
   void checkFanout(const Pin *pin,
 		   const MinMax *min_max,
 		   // Return values.
@@ -671,6 +673,7 @@ public:
   void reportCapacitanceLimitVerbose(Pin *pin,
 				     const Corner *corner,
 				     const MinMax *min_max);
+  // requires checkCapacitanceLimitPreamble()
   void checkCapacitance(const Pin *pin,
 			const Corner *corner,
 			const MinMax *min_max,
diff --git a/search/CheckCapacitanceLimits.cc b/search/CheckCapacitanceLimits.cc
index b3ff2e31..e4bd4d64 100644
--- a/search/CheckCapacitanceLimits.cc
+++ b/search/CheckCapacitanceLimits.cc
@@ -84,19 +84,6 @@ CheckCapacitanceLimits::CheckCapacitanceLimits(const StaState *sta) :
 {
 }
 
-void
-CheckCapacitanceLimits::init(const MinMax *min_max)
-{
-  const Network *network = sta_->network();
-  Cell *top_cell = network->cell(network->topInstance());
-  float top_limit;
-  bool top_limit_exists;
-  sta_->sdc()->capacitanceLimit(top_cell, min_max,
-				top_limit, top_limit_exists);
-  top_limit_= top_limit;
-  top_limit_exists_ = top_limit_exists;
-}
-
 void
 CheckCapacitanceLimits::checkCapacitance(const Pin *pin,
 					 const Corner *corner1,
@@ -154,12 +141,14 @@ CheckCapacitanceLimits::findLimit(const Pin *pin,
 				  float &limit,
 				  bool &exists) const
 {
-  // Default to top ("design") limit.
-  limit = top_limit_;
-  exists = top_limit_exists_;
-
   const Network *network = sta_->network();
   Sdc *sdc = sta_->sdc();
+
+  // Default to top ("design") limit.
+  Cell *top_cell = network->cell(network->topInstance());
+  sdc->capacitanceLimit(top_cell, min_max,
+			limit, exists);
+
   float limit1;
   bool exists1;
   if (network->isTopLevelPort(pin)) {
@@ -234,7 +223,6 @@ PinSeq *
 CheckCapacitanceLimits::pinCapacitanceLimitViolations(const Corner *corner,
 						      const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   PinSeq *violators = new PinSeq;
   LeafInstanceIterator *inst_iter = network->leafInstanceIterator();
@@ -275,7 +263,6 @@ Pin *
 CheckCapacitanceLimits::pinMinCapacitanceLimitSlack(const Corner *corner,
 						    const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   Pin *min_slack_pin = nullptr;
   float min_slack = MinMax::min()->initValue();
diff --git a/search/CheckCapacitanceLimits.hh b/search/CheckCapacitanceLimits.hh
index 8344221f..cabbd3d4 100644
--- a/search/CheckCapacitanceLimits.hh
+++ b/search/CheckCapacitanceLimits.hh
@@ -30,8 +30,6 @@ class CheckCapacitanceLimits
 {
 public:
   CheckCapacitanceLimits(const StaState *sta);
-  void init(const MinMax *min_max);
-  // Requires init().
   // corner=nullptr checks all corners.
   void checkCapacitance(const Pin *pin,
 			const Corner *corner1,
@@ -87,8 +85,6 @@ protected:
 				   Pin *&min_slack_pin,
 				   float &min_slack);
 
-  float top_limit_;
-  bool top_limit_exists_;
   const StaState *sta_;
 };
 
diff --git a/search/CheckFanoutLimits.cc b/search/CheckFanoutLimits.cc
index 780a4f2b..9d64ceca 100644
--- a/search/CheckFanoutLimits.cc
+++ b/search/CheckFanoutLimits.cc
@@ -72,19 +72,6 @@ CheckFanoutLimits::CheckFanoutLimits(const StaState *sta) :
 {
 }
 
-void
-CheckFanoutLimits::init(const MinMax *min_max)
-{
-  const Network *network = sta_->network();
-  Cell *top_cell = network->cell(network->topInstance());
-  float top_limit;
-  bool top_limit_exists;
-  sta_->sdc()->fanoutLimit(top_cell, min_max,
-			   top_limit, top_limit_exists);
-  top_limit_= top_limit;
-  top_limit_exists_ = top_limit_exists;
-}
-
 void
 CheckFanoutLimits::checkFanout(const Pin *pin,
 			       const MinMax *min_max,
@@ -113,12 +100,14 @@ CheckFanoutLimits::findLimit(const Pin *pin,
 			     float &limit,
 			     bool &exists) const
 {
-  // Default to top ("design") limit.
-  limit = top_limit_;
-  exists = top_limit_exists_;
-
   const Network *network = sta_->network();
   Sdc *sdc = sta_->sdc();
+
+  // Default to top ("design") limit.
+  Cell *top_cell = network->cell(network->topInstance());
+  sdc->fanoutLimit(top_cell, min_max,
+		   limit, exists);
+
   float limit1;
   bool exists1;
   if (network->isTopLevelPort(pin)) {
@@ -209,7 +198,6 @@ CheckFanoutLimits::fanoutLoad(const Pin *pin) const
 PinSeq *
 CheckFanoutLimits::pinFanoutLimitViolations(const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   PinSeq *violators = new PinSeq;
   LeafInstanceIterator *inst_iter = network->leafInstanceIterator();
@@ -248,7 +236,6 @@ CheckFanoutLimits::pinFanoutLimitViolations(Instance *inst,
 Pin *
 CheckFanoutLimits::pinMinFanoutLimitSlack(const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   Pin *min_slack_pin = nullptr;
   float min_slack = MinMax::min()->initValue();
diff --git a/search/CheckFanoutLimits.hh b/search/CheckFanoutLimits.hh
index 380e6c43..7baacae0 100644
--- a/search/CheckFanoutLimits.hh
+++ b/search/CheckFanoutLimits.hh
@@ -28,8 +28,6 @@ class CheckFanoutLimits
 {
 public:
   CheckFanoutLimits(const StaState *sta);
-  void init(const MinMax *min_max);
-  // Requires init().
   void checkFanout(const Pin *pin,
 		   const MinMax *min_max,
 		   // Return values.
@@ -62,8 +60,6 @@ protected:
 			      float &min_slack);
   float fanoutLoad(const Pin *pin) const;
 
-  float top_limit_;
-  bool top_limit_exists_;
   const StaState *sta_;
 };
 
diff --git a/search/CheckSlewLimits.cc b/search/CheckSlewLimits.cc
index 7cea9457..5abade33 100644
--- a/search/CheckSlewLimits.cc
+++ b/search/CheckSlewLimits.cc
@@ -85,19 +85,6 @@ CheckSlewLimits::CheckSlewLimits(const StaState *sta) :
 {
 }
 
-void
-CheckSlewLimits::init(const MinMax *min_max)
-{
-  const Network *network = sta_->network();
-  Cell *top_cell = network->cell(network->topInstance());
-  float top_limit;
-  bool top_limit_exists;
-  sta_->sdc()->slewLimit(top_cell, min_max,
-			 top_limit, top_limit_exists);
-  top_limit_= top_limit;
-  top_limit_exists_ = top_limit_exists;
-}
-
 void
 CheckSlewLimits::checkSlew(const Pin *pin,
 			   const Corner *corner,
@@ -187,12 +174,13 @@ CheckSlewLimits::findLimit(const Pin *pin,
 {
   exists = false;
   if (!sta_->graphDelayCalc()->isIdealClk(vertex)) {
-    // Default to top ("design") limit.
-    exists = top_limit_exists_;
-    limit = top_limit_;
-
     const Network *network = sta_->network();
     Sdc *sdc = sta_->sdc();
+
+    // Default to top ("design") limit.
+    Cell *top_cell = network->cell(network->topInstance());
+    sdc->slewLimit(top_cell, min_max,
+		   limit, exists);
     float limit1;
     bool exists1;
     if (check_clks) {
@@ -292,7 +280,6 @@ PinSeq *
 CheckSlewLimits::pinSlewLimitViolations(const Corner *corner,
 					const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   PinSeq *violators = new PinSeq;
   LeafInstanceIterator *inst_iter = network->leafInstanceIterator();
@@ -332,7 +319,6 @@ Pin *
 CheckSlewLimits::pinMinSlewLimitSlack(const Corner *corner,
 				      const MinMax *min_max)
 {
-  init(min_max);
   const Network *network = sta_->network();
   Pin *min_slack_pin = nullptr;
   float min_slack = MinMax::min()->initValue();
diff --git a/search/CheckSlewLimits.hh b/search/CheckSlewLimits.hh
index c5042175..8c65a049 100644
--- a/search/CheckSlewLimits.hh
+++ b/search/CheckSlewLimits.hh
@@ -33,8 +33,6 @@ class CheckSlewLimits
 {
 public:
   CheckSlewLimits(const StaState *sta);
-  void init(const MinMax *min_max);
-  // Requires init().
   // corner=nullptr checks all corners.
   void checkSlew(const Pin *pin,
 		 const Corner *corner,
@@ -108,8 +106,6 @@ protected:
 		    // Return value.
 		    ClockSet &clks) const;
 
-  float top_limit_;
-  bool top_limit_exists_;
   const StaState *sta_;
 };
 
diff --git a/search/Sta.cc b/search/Sta.cc
index 3011db7e..6f1c8dd7 100644
--- a/search/Sta.cc
+++ b/search/Sta.cc
@@ -4896,8 +4896,6 @@ Sta::checkSlew(const Pin *pin,
 	       float &limit,
 	       float &slack)
 {
-  checkSlewLimitPreamble();
-  check_slew_limits_->init(min_max);
   check_slew_limits_->checkSlew(pin, corner, min_max, check_clks,
 				corner1, rf, slew, limit, slack);
 }
@@ -4963,7 +4961,6 @@ Sta::checkFanout(const Pin *pin,
 		 float &slack)
 {
   checkFanoutLimitPreamble();
-  check_fanout_limits_->init(min_max);
   check_fanout_limits_->checkFanout(pin, min_max,
 				    fanout, limit, slack);
 }
@@ -5042,7 +5039,6 @@ Sta::checkCapacitance(const Pin *pin,
 		      float &slack)
 {
   checkCapacitanceLimitPreamble();
-  check_capacitance_limits_->init(min_max);
   check_capacitance_limits_->checkCapacitance(pin, corner, min_max,
 					      corner1, rf, capacitance,
 					      limit, slack);