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Speeding up tippecanoe-overzoom (#191)

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* Speed up mvt_value comparison

* Converting repetitive ifs to cases

* More conversions from ifs to cases

* Optimize the always-true filter case

* Don't convert types of attributes without accumulators

* Unordered map seems to be faster than map

* Add missing header

* Fix some warnings

* Fix the warnings better

* Avoid an int->string->int conversion

* Lazily initialize layer key and values maps when actually needed

* More switches from maps to unordered_maps

* Sure, I'll take the microoptimization

* More emplacement

* Save some copies

* Emplaces and moves

* Lazy linear scan of attributes instead of building a map

* Extra printfs, missing header

* Avoid clipping if the input and output tiles are the same

* But do clip if the tile extent is being reduced

* Make sure I'm not constructing std::strings here at runtime

* More worrying about runtime string construction

* A couple more std::moves

* Const references!

* More const references

* Another std::move

* Make the string_value of mvt_value std::optional

* Reserve storage when decoding

* Provision for different mvt_values to share a string pool

* Use the string pool when decoding

* Avoid another string construction

* Try limiting the depth of the search for duplicate attributes

* Revert "Try limiting the depth of the search for duplicate attributes"

This reverts commit 9ec94a15ff.

* Update changelog

* Fix typo noticed during code review
This commit is contained in:
Erica Fischer
2024-01-29 11:33:56 -08:00
committed by GitHub
parent cbf222754b
commit 7d4d264d50
20 changed files with 553 additions and 276 deletions
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serial.hpp
+2 -2
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@@ -175,7 +175,7 @@ struct serialization_state {
std::map<std::string, layermap_entry> *layermap = NULL;
std::map<std::string, int> const *attribute_types = NULL;
std::unordered_map<std::string, int> const *attribute_types = NULL;
std::set<std::string> *exclude = NULL;
std::set<std::string> *include = NULL;
int exclude_all = 0;
@@ -228,6 +228,6 @@ struct node {
int nodecmp(const void *void1, const void *void2);
int serialize_feature(struct serialization_state *sst, serial_feature &sf);
void coerce_value(std::string const &key, int &vt, std::string &val, std::map<std::string, int> const *attribute_types);
void coerce_value(std::string const &key, int &vt, std::string &val, std::unordered_map<std::string, int> const *attribute_types);
#endif