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2f27a3ede2
Replace the per-chunk query cache from []Result slices to fixed-size bitmaps (ChunkBitmap: [16]uint64 = 128 bytes per entry). Each bit indicates whether the corresponding item in the chunk matched. This reduces cache memory by 86 times in testing: - Old []Result cache: ~22KB per chunk per query (for 500 matches) - New bitmap cache: ~262 bytes per chunk per query (fixed) With the reduced per-entry cost, queryCacheMax is raised from chunkSize/5 to chunkSize/2, allowing broader queries (up to 50% match rate) to be cached while still using far less memory.
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
package fzf
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import (
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"math"
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"time"
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"github.com/junegunn/fzf/src/util"
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)
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const (
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// Core
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coordinatorDelayMax time.Duration = 100 * time.Millisecond
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coordinatorDelayStep time.Duration = 10 * time.Millisecond
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// Reader
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readerBufferSize = 64 * 1024
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readerSlabSize = 128 * 1024
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readerPollIntervalMin = 10 * time.Millisecond
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readerPollIntervalStep = 5 * time.Millisecond
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readerPollIntervalMax = 50 * time.Millisecond
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// Terminal
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initialDelay = 20 * time.Millisecond
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initialDelayTac = 100 * time.Millisecond
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spinnerDuration = 100 * time.Millisecond
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previewCancelWait = 500 * time.Millisecond
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previewChunkDelay = 100 * time.Millisecond
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previewDelayed = 500 * time.Millisecond
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maxPatternLength = 1000
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maxMulti = math.MaxInt32
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// Background processes
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maxBgProcesses = 30
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maxBgProcessesPerAction = 3
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// Matcher
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progressMinDuration = 200 * time.Millisecond
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// Capacity of each chunk
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chunkSize int = 1024
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chunkBitWords = (chunkSize + 63) / 64
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// Pre-allocated memory slices to minimize GC
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slab16Size int = 100 * 1024 // 200KB * 32 = 12.8MB
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slab32Size int = 2048 // 8KB * 32 = 256KB
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// Do not cache results of low selectivity queries
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queryCacheMax int = chunkSize / 2
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// Not to cache mergers with large lists
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mergerCacheMax int = 100000
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// History
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defaultHistoryMax int = 1000
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// Jump labels
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defaultJumpLabels string = "asdfghjklqwertyuiopzxcvbnm1234567890ASDFGHJKLQWERTYUIOPZXCVBNM`~;:,<.>/?'\"!@#$%^&*()[{]}-_=+"
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)
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// fzf events
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const (
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EvtReadNew util.EventType = iota
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EvtReadFin
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EvtSearchNew
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EvtSearchProgress
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EvtSearchFin
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EvtReady
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EvtQuit
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)
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const (
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ExitOk = 0
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ExitNoMatch = 1
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ExitError = 2
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ExitBecome = 126
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ExitInterrupt = 130
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)
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