mirror of
https://github.com/felt/tippecanoe.git
synced 2026-10-02 08:25:40 +02:00
Erica Fischer
e2a7a409c7
* Add a way to run tippecanoe single-threaded for profiling * Do less work when the tilestats sample values list is already full * Save a copy when retrieving the attribute key * Fewer atomic operations * Move string hashing from mbtiles to text * Only do approximate attribute deduplication when writing tiles * Feature dropping tests are sensitive to exact tile size * All tile creators now create a string pool for the tile * Features clipped away to nothing should not participate in that tile * Revert "Only do approximate attribute deduplication when writing tiles" This reverts commitc42b34b498. * Also revert the related test changes * Revert "Revert "Only do approximate attribute deduplication when writing tiles"" This reverts commit18509876c3. * Be more specific about the string hash function * Use fnv1a instead of std::hash for everything * Reduce the chance of hash collisions * Stick a hash search on the front of the tree search in addpool * Eliminate repeated hashing of the same string * Switch instead of ifs in json parsing * A few more cases to populate the hash in addpool * Store the hash in the tree instead of recalculating * Add explanatory comment for mysterious argument * Fewer copies in attribute stringification * Clean up ancient weirdness in JSON attribute stringification * More serial_val cleanup * Pass a serial_feature to rewrite instead of many broken-down arguments * Get rid of the multiple geometries within `partial` * Revert "Pass a serial_feature to rewrite instead of many broken-down arguments" This reverts commit6f4ab9b725. * Goodbye, struct coalesce * Revert "Features clipped away to nothing should not participate in that tile" This reverts commit124462fbdc. * Migrating fields from partial to serial_feature * Name reconciliation between serial_feature and partial * Replace struct partial with an augmented serial_feature * Fix some overzealous search-and-replace renaming * Don't say struct so often * Remove more of the former partial construction * Commenting and cleaning up * Trying again to avoid all these arguments to rewrite * I swear I did this same thing before and it didn't work. * More rewrite cleanup * Exile --detect-shared-borders to its own file * Add missing headers * More commenting and cleanup * More comments * Sprinkle consts around * Emplacing and std::moving * More cleanup * That shouldn't have worked after a std::move * Don't need to allocate memory to compare keys * Reduce use of the global string pool in tiling * Another avoidable mvt_value construction * Further reduction to explicit string pool passing * These reverses are no longer optimizations * These layernames can all be references * Don't drag an unused layername string around with every feature * Heed a compiler warning about potential buffer overflow * Fix my confusion about which feature's string pool is relevant * Avoid some unnecessary allocations in attribute accumulation * Maybe faster serialization? * Eliminate a comparison * Do the same here * Save a couple of allocations when parsing numbers in JSON * Immediately assign features to layers instead of subdividing later * Maintain tilestats for tippecanoe:retain_points_multiplier_sequence * Crunch out more duplicate attribute values when writing out the tile * Do tilestats for tippecanoe:retain_points_multiplier_first too * Shell filters need to be real threads, even if nothing else does * Simplify tippecanoe_minzoom/maxzoom representation * Update version and changelog
23 lines
796 B
C++
23 lines
796 B
C++
#include <stdlib.h>
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#include "thread.hpp"
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// It is harder to profile tippecanoe because of its normal use of multiple threads.
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// If you set TIPPECANOE_NO_THREADS in the environment, it will run everything in
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// the main thread instead for more straightforward profiling. (The threads will
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// then still be created so they will be reaped, but they will immediately return.)
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static const char *no_threads = getenv("TIPPECANOE_NO_THREADS");
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static void *do_nothing(void *arg) {
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return arg;
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}
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int thread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine)(void *), void *arg) {
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if (no_threads != NULL) {
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void *ret = start_routine(arg);
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return pthread_create(thread, attr, do_nothing, ret);
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} else {
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return pthread_create(thread, attr, start_routine, arg);
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}
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}
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