Mercurial > gemma
view pkg/controllers/statsupdates.go @ 5520:05db984d3db1
Improve performance of bottleneck area calculation
Avoid buffer calculations by replacing them with simple distance comparisons
and calculate the boundary of the result geometry only once per iteration.
In some edge cases with very large numbers of iterations, this reduced
the runtime of a bottleneck import by a factor of more than twenty.
author | Tom Gottfried <tom@intevation.de> |
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date | Thu, 21 Oct 2021 19:50:39 +0200 |
parents | 5f47eeea988d |
children | 6270951dda28 |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2021 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package controllers import ( "database/sql" "net/http" "github.com/gorilla/mux" "gemma.intevation.de/gemma/pkg/log" mw "gemma.intevation.de/gemma/pkg/middleware" ) const ( listStatsUpdatesSQL = `SELECT name FROM sys_admin.stats_updates ORDER BY name` statsUpdatesScriptSQL = `SELECT script FROM sys_admin.stats_updates WHERE name = $1` ) func listStatsUpdates(req *http.Request) (jr mw.JSONResult, err error) { ctx := req.Context() conn := mw.JSONConn(req) rows, err2 := conn.QueryContext(ctx, listStatsUpdatesSQL) if err2 != nil { log.Errorf("%v\n", err2) err = mw.JSONError{ Code: http.StatusInternalServerError, Message: "Listing stats update failed.", } return } defer rows.Close() names := []string{} for rows.Next() { var name string if err2 := rows.Scan(&name); err2 != nil { log.Errorf("%v\n", err2) err = mw.JSONError{ Code: http.StatusInternalServerError, Message: "Fetching stats update names failed.", } return } names = append(names, name) } if err2 := rows.Err(); err2 != nil { log.Errorf("%v\n", err2) err = mw.JSONError{ Code: http.StatusInternalServerError, Message: "Fetching stats update names failed.", } return } out := struct { StatsUpdates []string `json:"stats-updates"` }{ StatsUpdates: names, } jr = mw.JSONResult{Result: out} return } func statsUpdates(req *http.Request) (jr mw.JSONResult, err error) { name := mux.Vars(req)["name"] ctx := req.Context() conn := mw.JSONConn(req) var script string err2 := conn.QueryRowContext(ctx, statsUpdatesScriptSQL, name).Scan(&script) switch { case err2 == sql.ErrNoRows: err = mw.JSONError{ Code: http.StatusNotFound, Message: "No such update script.", } return case err2 != nil: log.Errorf("%v\n", err2) err = mw.JSONError{ Code: http.StatusInternalServerError, Message: "Loading update script failed.", } return } if _, err2 := conn.ExecContext(ctx, script); err2 != nil { log.Errorf("%v\n", err2) err = mw.JSONError{ Code: http.StatusInternalServerError, Message: "Loading update script failed.", } return } jr = mw.JSONResult{Result: map[string]interface{}{}} return }