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https://github.com/gohugoio/hugo.git
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5800a20a25
This commit adds a "cache potential" column when running `hugo --templateMetrics --templateMetricsHints`. This is only calculated when `--templateMetricsHints` is set, as these calculations has an negative effect on the other timings. This gives a value for partials only, and is a number between 0-100 that indicates if `partial` can be replaced with `partialCached`. 100 means that all execution of the same partial resulted in the same output. You should do some manual research before going "all cache".
136 lines
3.5 KiB
Go
136 lines
3.5 KiB
Go
// Copyright 2017 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package partials
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import (
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"fmt"
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"html/template"
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"strings"
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"sync"
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texttemplate "text/template"
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bp "github.com/gohugoio/hugo/bufferpool"
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"github.com/gohugoio/hugo/deps"
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)
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// TestTemplateProvider is global deps.ResourceProvider.
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// NOTE: It's currently unused.
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var TestTemplateProvider deps.ResourceProvider
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// partialCache represents a cache of partials protected by a mutex.
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type partialCache struct {
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sync.RWMutex
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p map[string]interface{}
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}
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// New returns a new instance of the templates-namespaced template functions.
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func New(deps *deps.Deps) *Namespace {
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return &Namespace{
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deps: deps,
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cachedPartials: partialCache{p: make(map[string]interface{})},
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}
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}
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// Namespace provides template functions for the "templates" namespace.
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type Namespace struct {
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deps *deps.Deps
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cachedPartials partialCache
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}
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// Include executes the named partial and returns either a string,
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// when the partial is a text/template, or template.HTML when html/template.
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func (ns *Namespace) Include(name string, contextList ...interface{}) (interface{}, error) {
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if strings.HasPrefix("partials/", name) {
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name = name[8:]
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}
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var context interface{}
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if len(contextList) == 0 {
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context = nil
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} else {
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context = contextList[0]
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}
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for _, n := range []string{"partials/" + name, "theme/partials/" + name} {
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templ := ns.deps.Tmpl.Lookup(n)
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if templ == nil {
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// For legacy reasons.
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templ = ns.deps.Tmpl.Lookup(n + ".html")
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}
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if templ != nil {
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b := bp.GetBuffer()
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defer bp.PutBuffer(b)
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if err := templ.Execute(b, context); err != nil {
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return "", err
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}
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if _, ok := templ.Template.(*texttemplate.Template); ok {
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s := b.String()
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if ns.deps.Metrics != nil {
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ns.deps.Metrics.TrackValue(n, s)
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}
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return s, nil
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}
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s := b.String()
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if ns.deps.Metrics != nil {
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ns.deps.Metrics.TrackValue(n, s)
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}
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return template.HTML(s), nil
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}
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}
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return "", fmt.Errorf("Partial %q not found", name)
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}
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// IncludeCached executes and caches partial templates. An optional variant
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// string parameter (a string slice actually, but be only use a variadic
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// argument to make it optional) can be passed so that a given partial can have
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// multiple uses. The cache is created with name+variant as the key.
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func (ns *Namespace) IncludeCached(name string, context interface{}, variant ...string) (interface{}, error) {
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key := name
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if len(variant) > 0 {
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for i := 0; i < len(variant); i++ {
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key += variant[i]
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}
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}
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return ns.getOrCreate(key, name, context)
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}
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func (ns *Namespace) getOrCreate(key, name string, context interface{}) (p interface{}, err error) {
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var ok bool
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ns.cachedPartials.RLock()
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p, ok = ns.cachedPartials.p[key]
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ns.cachedPartials.RUnlock()
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if ok {
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return
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}
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ns.cachedPartials.Lock()
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if p, ok = ns.cachedPartials.p[key]; !ok {
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ns.cachedPartials.Unlock()
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p, err = ns.Include(name, context)
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ns.cachedPartials.Lock()
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ns.cachedPartials.p[key] = p
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}
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ns.cachedPartials.Unlock()
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return
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}
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