Merge branch '3915-fix-significant-time-waste' into 'master'

reduce time that plugin callbacks spent to determine that they do not run

Closes #3915

See merge request integer/scip!3844

Author: DominikKamp

CHANGELOG

@@ -40,6 +40,7 @@ Performance improvements
 
 - reimplemented SCIPvarGetActiveRepresentatives() by using dense arrays to avoid repeated resorting.
 - simplified symmetry detection graphs in case all edges have the same color
+- avoid unnecessary calls of constraint handlers components, benders, benderslp, propagator genvbounds, and heuristics ofins, subnlp, nlpdiving, indicator
 
 Examples and applications
 -------------------------
@@ -157,6 +158,8 @@ Interface changes
 - added SCIPincludeRelaxBenders(), which is used to include the Benders' decomposition relaxator.
 - added SCIPgetMasterProblemRelaxBenders() for retrieving the master problem SCIP instance from the Benders' decomposition relaxator.
 - added SCIPsortDownIntIntIntReal()
+- SCIPconshdlrSetNeedsCons() to set whether constraint handler callbacks should also be called if there are no constraints
+- SCIPpropSetTimingmask() to set timing mask of a propagator
 
 ### Changes in preprocessor macros
 
@@ -165,6 +168,8 @@ Interface changes
 - SCIPincludeConshdlrOrbitopePP(), SCIPcreateConsOrbitopePP(), SCIPcreateConsBasicOrbitopePP(), SCIPincludeConshdlrOrbitopeFull(), SCIPcreateConsOrbitopeFull(), SCIPcreateConsBasicOrbitopeFull()
 - SCIP_VERSION_SUB and SCIP_SUBVERSION are deprecated
 - removed SCIP_VARTYPE_IMPLINT_CHAR
+- added SCIP_PROPTIMING_NONE propagator timing to never call
+- added SCIP_HEURTIMING_NONE heuristic timing to never call
 
 ### Command line interface
 
@@ -184,6 +189,8 @@ Interface changes
 - removed reading/gmsreader/signpower
 - removed benders/default/numthreads, multi-threading support for Benders' decomposition has been temporarily disabled.
 - restricted range of parameter propagating/symmetry/sstleadervartype to [1,7]; its new default value is 6
+- propagating/*/timingmask extended by setting 0 to disable propagators completely
+- changed defaults of constraints/components/propfreq and constraints/components/maxdepth to -1 and 2147483647, respectively, to avoid unnecessary calls of components propagator by default
 
 ### New parameters
 

CMakeLists.txt

@@ -21,7 +21,7 @@ set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_DEBUG} ${CMAKE_CXX_FLAGS_R
 set(SCIP_VERSION_MAJOR 10)
 set(SCIP_VERSION_MINOR 0)
 set(SCIP_VERSION_PATCH 0)
-set(SCIP_VERSION_API 143)
+set(SCIP_VERSION_API 144)
 
 project(SCIP
     VERSION ${SCIP_VERSION_MAJOR}.${SCIP_VERSION_MINOR}.${SCIP_VERSION_PATCH}

make/make.project

@@ -97,7 +97,7 @@ CLOCKTYPE	=	1
 SCIP_VERSION_MAJOR = 10
 SCIP_VERSION_MINOR = 0
 SCIP_VERSION_PATCH = 0
-SCIP_VERSION_API = 143
+SCIP_VERSION_API = 144
 SCIP_VERSION = $(SCIP_VERSION_MAJOR).$(SCIP_VERSION_MINOR).$(SCIP_VERSION_PATCH)
 
 # compiling and linking parameters

src/scip/cons.c

@@ -5289,6 +5289,17 @@ SCIP_Bool SCIPconshdlrNeedsCons(
    return conshdlr->needscons;
 }
 
+/** sets the needscons flag of constraint handler, for example to disable without constraints */
+void SCIPconshdlrSetNeedsCons(
+   SCIP_CONSHDLR*        conshdlr,           /**< constraint handler */
+   SCIP_Bool             needscons           /**< should be skipped, if no constraints are available? */
+   )
+{
+   assert(conshdlr != NULL);
+
+   conshdlr->needscons = needscons;
+}
+
 /** does the constraint handler perform presolving? */
 SCIP_Bool SCIPconshdlrDoesPresolve(
    SCIP_CONSHDLR*        conshdlr            /**< constraint handler */